The Amakasu Maru 1. A water tanker from port Yokohama. Depth: 1000 m. Report: oer.hpc.msstate.edu/okeanos/e... www.combinedfleet.com/Amakasu_... Music: IH_Meditation
The water is so clear because the Pacific is dead, due to atom-bomb testing and the amount of radioactive water (billions of gallons) still being flushed into the ocean by the power plant meltdown in Fukushima. Although not tested in years, radioactivity reached 200 miles from the American coast-line.
slighter I am with you right up to subject of Japan’s involvement in this war. en.m.wikipedia.org/wiki/Japanese_history_textbook_controversies This a summary view - with potentially some minor errors associated with the wiki process. However, Japan’s shrine to Tojo and his boys still stands and their memory defended. It took decades to acknowledge Nanking 1937.
Its incredible this was picked up from one anomaly on the miltibeam point display. Makes you wonder how many others are missed, wrecks and their ghosts, hoping to one day see light again.
I well remember them! Age 98 now. Kodak actually GAVE the cameras away, so they could make money selling the film, and processing fees. As a native of Rochester,NY, home of Kodak, I worked for them on 2 occasions until going to GM, where I prospered well. even w/o a degree.
She was part of a convoy in the Formosa Strait which was attacked by 2 U.S. submarines. The 'Bang' (SS-385) sunk her and the Sakea Maru. The Redfish(SS-395) sank the Hozan Maru. November 23 1944
Well, according to Alden (page 25) she was sunk on December 24, at 9AM in the morning by the USS Triton SS 201. It was a daylight attack using the periscope and 3 torpedoes were fired. The Bang sank the Amakasa (note spelling) on November 23, 1944 at 2AM in a night surface attack. (3 torpedoes fired). Bang made 5 attacks that night and Redfish sank the Cargo ship Hozan of about 2500 tons 2 hours before..
It seem like a single projectile and an internal explosion took her down as she where sailing. Some deck personnel must be killed, but most likely the main part of the crew have managed to survive the sinking. The open doors on the ship prove that engine men had time to get out.
She was torpedoed... that's known, but yeah I agree, doesnt look like a normal torpedo hit, they usually leave quite a large hole. It was sunk in '42, so they were probably still using magnetic detonators. I'm wondering if the warhead went off slightly early. I would have originally said that, that was concussive damage from a near miss from a bomb, the side plating had clearly been pushed in from a conclusive blast. But having since read she was definitely sunk by a sub, not an aircraft, maybe the torps warhead detonated early, and the concussion wave from the blast ruptured the side, sinking her anyway through flooding.
it wasn't known at the time but, when the war was coming to a close, many Japanese ship were transporting pow's in the pacific. hatches were sealed tight and the conditions were terrible for those being transported. but many of these ships were seen as easy targets for roaming aircraft and were attacked accordingly. little did they know that many of those ships that went down took their cargo into the depths with them. such is war.
101327 I read recently that some American airmen shot down during the Battle of Midway were fished out of the sea by the Japanese, tortured and interrogated then shot and dropped overboard. I don't know if that really happened though.
My cousin was one of 80 survivors of the Shinyo Maru (not sure of spelling) He said the Japanese were picking up their survivors and shooting ours. he dove under when the came towards him. he was captured at Bataan.
@101327 - Since the advent of powered ships sailors are chiefly machine operators. Very rarely do they ram and board another warship. In the sail days battles at sea got downright bloody. The marines did the initial boarding, then one of the crews of sailors of each warship would get in on the hacking, slicing and stabbing. The other crew had to operate the ship.
Imagine what goes thru ones mind as water begins pouring in thru the ventilation ducts as you feel the room your inside of begining to roll over. Knowing the door in and out is latched and dogged down from the other side. How horrible of a scenario such as this played out in many sailors last moments of life....i get a sick feeling at simply imagining being in such a situation...then I realize that someone played the price and took on all that panic and fear of that horrible death so that I wouldn't have to. Someone paid the ultimate price for us to sit here and play around on TH-cam, and chase our dreams and fall in love like its something we are entitled to.....oh how selfish we are...how absurd and arrogant a human I must be to live out my life without realizing my every breath is a gift granted or paid for by someone else. God gave me my life, Jesus gave me my salvation and my grandparents generation gave me the freedom to be what ever I want to be in this life...which is why its important we live to be greater than just a common selfish asshole. The world has on overwhelming surplus of selfish assholes....be greater than that. Its how we pay our debt to those we owe.
M. S. L. His entire rambling was just to put the whole religion aspect into the video....I am only curious to know if all the fuel is still in her tanks...
davy1458...don't listen to these clueless assholes commenting against you. I feel your empathy for the dead. To be in touch with History and remembering the loss...that is something these degenerates cannot feel. Peace.
It's a shame that the technology doesn't yet exist to be able to scuba-dive to these insane depths and look around without needing an ROV.It would be mind-blowing.I'm sure the day will come
@@2011ACVVV I doubt that that even if it ever were possible,the kind of vermin that would do that kind of thing would ever be skilled enough or able to afford it
@@Dunstire Many ships that are in shallow water have been removed by scrapers! Mostly in the Java sea. Grave robbers only see the money even when they find bones with the steel.
@@2011ACVVV There used to one of those that docked and filled at the old dry dock at Roosevelt Rhodes, along with a water barge, for the dry Virgin Islands. I was wondering what kind of a ship it was. Thanks a lot! The poem was about any ship, really, just an allusion to purpose and life and death at sea.
Impact damage not explosive. Plus torpedoes were designed to go off under the hull not poke a ship in the side. If it did the target area is under silt.
@@christophermckeon9030 The first part of the war the torpedoes were made to do that. But too many did not work. So we stopped using them and used contact. but even those had a problem. There is many books written about our poor quality torpedoes. Sad but true.
@@ritzvillelumber5122 Aye, that's true, but in Dec 1942 magnetic exploders were still being used on the majority of torpedoes as Bu-Ord was refusing investigation for CYA purposes...even tho some skippers removed the magnetic exploders against regulations. If you read the Triton's log they report in Dec 1942 one torpedo that exploded halfway to a target (a magnetic exploder issue), and four that hit or appeared to hit but failed to detonate (that's a contact exploder problem) (issuu.com/hnsa/docs/ss-201_triton, pp 142-43). These were different ships. One could surmise the Triton was firing a mix of torps that were magnetic and non-magnetic. Wikipedia notes this ship was sunk when one torp hit "under the stack" and another "under the foremast" but it isn't clear if the detonations were beneath the keel in those spots or contact hits along the hull, not to mention wikipedia contradicts the Triton's log.
Sunk off Salamaua Papua New Guinea in 1942. The first ship sunk by US Arial Torpedoes. I have dived this area but not so deep. I guess this wreck lies in 500m of water or more
A water carrier. AMAKASU MARU NO. 1. , launched in August 1939, was a 1,913- ton, 271-foot long, 40-foot beam, Type D merchant vessel, the first of her class.
This wreck was clearly heavily damaged during the sinking, but I'm amazed that it's not covered in rusticles and the fact the name is still legible on the stern of the ship. It appears to me the ship is beginning to collapse because of the ravages of corrosion.
Probably due to the metals used (Steel vs Iron) and the layers of lead-based paint is why you aren't seeing "Rusticles". Another reason might be very different microorganisms in the different locations, colder Atlantic waters Vs. warmer Pacific waters.
@@stephenhoward6829 the explanation I heard was that depth makes the difference. Upper layers of the ocean have more bacteria in competition with each other and rusticle bacteria have an open field at the lower depths.
I am going to take a wild guess. I believe what we are seeing is a fleet oiler. I am basing this on the shortage of large caliber guns and the lack of deck armour. Narration would have been nice. Does anyone know the ship's name yet?
There was an expedition August 2019. The deck house collapsed and the captain's bathtub is no longer visible. I saw it on TV not long ago, but I can't find that docu. Here a short clip: www.bbc.com/news/science-environment-49420935
Torpedo in za vater...most of the battle ship was snaked by those dreaded submarine....i have watched a lot of history show....an blah blah they always say she took a torpedo....almost 100 percent of the time
I was charmed by a first impression of the benign nature of freshwater tanker delivering the precious and vital, life-giving fluid to desert islands everywhere in the seawater world of the Pacific ONLY, no guns; absolutely orientally even, poetically wonderful to see here. Without its purpose to aid, abet and fuel fascist indiscriminate murdering savage barbarians in their historically unprecedented national mistake of all time, the charm is possible, and nice to see and think about here - what it could have been without the crazy ethnocentric fascism part of it all.
richard cranium In fact the one filming the ROV is an ROV but it's also a weight. It's hanging on the main cable and the vessel drags it. The ROV on the sea floor is connected with the ROV above him but can operate on it's own without the influence from the surface waves. oceanexplorer.noaa.gov/technology/subs/seirios/seirios.html
9:35 "DAIICHI AMAKASU MARU"(第一あまかす丸）was a water supply vessel. Thank you for finding our old vessel.
We always pray for world peace.
Amazing state of preservation and water clarity! Thank you for sharing!
The water is so clear because the Pacific is dead, due to atom-bomb testing and the amount of radioactive water (billions of gallons) still being flushed into the ocean by the power plant meltdown in Fukushima. Although not tested in years, radioactivity reached 200 miles from the American coast-line.
japanese tanker amakasu-maruNo.1 was nov. 1942 sunk by ss-201 triton near wake Island
Very good, love the clear water and the length of footage, it gives a good view of everything. 👍👍👍👍👍
Thank you for the diving details provided at top! This is a great view of this long lost ship. R.I.P. to the crew for their sacrifice.
Amazing pictures and the back ground music is amazing
Excellent, thank you. The attached PDF was helpful.
Look , it still holds water. after all those years.
There is even still fresh fish in the galley!
LMAO! Beautiful!
They made them to last back then.
@@nickramundo6720 No need to fight old wars all over again. Let the past rest and try to be less discriminative against people of other groups.
slighter I am with you right up to subject of Japan’s involvement in this war. en.m.wikipedia.org/wiki/Japanese_history_textbook_controversies This a summary view - with potentially some minor errors associated with the wiki process. However, Japan’s shrine to Tojo and his boys still stands and their memory defended. It took decades to acknowledge Nanking 1937.
Its incredible this was picked up from one anomaly on the miltibeam point display. Makes you wonder how many others are missed, wrecks and their ghosts, hoping to one day see light again.
We still have yet to find Shinano, the largest aircraft carrier of its time
Five
first camera I ever saw and used was a brownie box camera , now look at what they can do ,amazing !!
I wonder how many people watching this know what a brownie box camera is , just curious ....an old guy question. but this filming is truely incredible
I well remember them! Age 98 now. Kodak actually GAVE the cameras away, so they could make money selling the film, and processing fees. As a native of Rochester,NY, home of Kodak, I worked for them on 2 occasions until going to GM, where I prospered well. even w/o a degree.
Great footage.....crystal clear......
Thank you nice photography good lighting
Daiichi Amakasu mar (第一あまかす丸).
The state of preservation is remarkable..
great musical effects
Super clear water!
nice rov footage,, its surprisingly intact considering the growth of sealife present.
UNBELIEVABLE QUALITÀ,GRAZIE
Very peaceful music well done.
Good photographs
Thanks for this, I love under water video.
Great, detailed, well lit
A little, SPRAY-ON- "Flex shield" & good as NEW!
Lights out and you would not see a thing. It's really deep.
And cargo still intact.
Amazing Video 🧐
She was part of a convoy in the Formosa Strait which was attacked by 2 U.S. submarines. The 'Bang' (SS-385) sunk her and the Sakea Maru. The Redfish(SS-395) sank the Hozan Maru. November 23 1944
My friend's father served on the Bang.
Well, according to Alden (page 25) she was sunk on December 24, at 9AM in the morning by the USS Triton SS 201. It was a daylight attack using the periscope and 3 torpedoes were fired.
The Bang sank the Amakasa (note spelling) on November 23, 1944 at 2AM in a night surface attack. (3 torpedoes fired). Bang made 5 attacks that night and Redfish sank the Cargo ship Hozan of about 2500 tons 2 hours before..
@@webbtrekker534 Thanks for the info. Needed some context.
Didn't the US Navy have reliability issues with their Torpedoes during WW2 Obviously not the ones that sank this ship though
@@michaelhearne1960 correct
Its amazing to think that that ship was onced manned and a fully functioning workplace for those soldiers.
*Sailors
Good ole lead based paint still clinging on.
About 3,000 Japanese WWII wrecks out there.
Awesome!
War is hell!
Vry nice clearly all picture
It seem like a single projectile and an internal explosion took her down as she where sailing. Some deck personnel must be killed, but most likely the main part of the crew have managed to survive the sinking. The open doors on the ship prove that engine men had time to get out.
12 crew members died.
She was torpedoed... that's known, but yeah I agree, doesnt look like a normal torpedo hit, they usually leave quite a large hole. It was sunk in '42, so they were probably still using magnetic detonators. I'm wondering if the warhead went off slightly early. I would have originally said that, that was concussive damage from a near miss from a bomb, the side plating had clearly been pushed in from a conclusive blast. But having since read she was definitely sunk by a sub, not an aircraft, maybe the torps warhead detonated early, and the concussion wave from the blast ruptured the side, sinking her anyway through flooding.
And there are people who think Supply units just played cards throughout the war ♦️♣️♣️♣️♥️🥴
It's crazy to think people are still in there
very nice!
it wasn't known at the time but, when the war was coming to a close, many Japanese ship were transporting pow's in the pacific. hatches were sealed tight and the conditions were terrible for those being transported. but many of these ships were seen as easy targets for roaming aircraft and were attacked accordingly. little did they know that many of those ships that went down took their cargo into the depths with them. such is war.
They had no honor for anyone, to include civilians. Brutal treatment and cruelty was what they unleashed on everyone.
101327 I read recently that some American airmen shot down during the Battle of Midway were fished out of the sea by the Japanese, tortured and interrogated then shot and dropped overboard. I don't know if that really happened though.
My cousin was one of 80 survivors of the Shinyo Maru (not sure of spelling) He said the Japanese were picking up their survivors and shooting ours. he dove under when the came towards him. he was captured at Bataan.
@101327 - Since the advent of powered ships sailors are chiefly machine operators. Very rarely do they ram and board another warship.
In the sail days battles at sea got downright bloody. The marines did the initial boarding, then one of the crews of sailors of each warship would get in on the hacking, slicing and stabbing. The other crew had to operate the ship.
Beautiful haunting music , the guns are silent now , her hull sleeps in the deep , the quarrel with the Enemy Is pass.
Belles photos
There are various scenes showing the Explorer around the vessel. Who is filming that footage ?
An ROV from NOAA ship Okeanos Explorer.
Imagine what goes thru ones mind as water begins pouring in thru the ventilation ducts as you feel the room your inside of begining to roll over. Knowing the door in and out is latched and dogged down from the other side. How horrible of a scenario such as this played out in many sailors last moments of life....i get a sick feeling at simply imagining being in such a situation...then I realize that someone played the price and took on all that panic and fear of that horrible death so that I wouldn't have to. Someone paid the ultimate price for us to sit here and play around on TH-cam, and chase our dreams and fall in love like its something we are entitled to.....oh how selfish we are...how absurd and arrogant a human I must be to live out my life without realizing my every breath is a gift granted or paid for by someone else. God gave me my life, Jesus gave me my salvation and my grandparents generation gave me the freedom to be what ever I want to be in this life...which is why its important we live to be greater than just a common selfish asshole. The world has on overwhelming surplus of selfish assholes....be greater than that. Its how we pay our debt to those we owe.
davy1458 why would they be locked in their own ship? Also why would the does only work from the outside?
M. S. L. His entire rambling was just to put the whole religion aspect into the video....I am only curious to know if all the fuel is still in her tanks...
Somebody's got waaaaay too much time on his hands...
davy1458...don't listen to these clueless assholes commenting against you. I feel your empathy for the dead. To be in touch with History and remembering the loss...that is something these degenerates cannot feel. Peace.
@@mikemanners1069 I second that! Amen.
SUPER!!!
Very ghostly
It looks like it got hit by a torpedo, then burned for a while before it sank.
8:29 OKOHAMA...sure! It is Yokohama!
Laydownkeel:1939.4.25:complete:1940.2.6sink:1942.12.24nearwakeiland torpedored USS TRITON
Where do you get this footage?
From live ROV dives. oceanexplorer.noaa.gov/livestreams/welcome.html
Down among the dead men , !
Looks like a 'tender' or an 'oiller'. A great many motors on deck to pull in wire rope. Valves on the side likely to transfer fuel or oils.
Good observation! It was a water tanker from port Yokohama.
Are there bodies in storage compartments inside it??
Maybe...I don't know.
12 Crew members have lost their life.
3,280 feet deep.
It's a shame that the technology doesn't yet exist to be able to scuba-dive to these insane depths and look around without needing an ROV.It would be mind-blowing.I'm sure the day will come
Shipwrecks and war graves will be looted in a blink of an eye.
@@2011ACVVV I doubt that that even if it ever were possible,the kind of vermin that would do that kind of thing would ever be skilled enough or able to afford it
@@Dunstire Many ships that are in shallow water have been removed by scrapers! Mostly in the Java sea. Grave robbers only see the money even when they find bones with the steel.
Still has water in the tanks.
The bones of the Fisherman lay with the bones of his fishing boat, deep beneath the waves. Only the fish win.
It was a water carrier.
@@2011ACVVV There used to one of those that docked and filled at the old dry dock at Roosevelt Rhodes, along with a water barge, for the dry Virgin Islands. I was wondering what kind of a ship it was. Thanks a lot! The poem was about any ship, really, just an allusion to purpose and life and death at sea.
Clear torpedo damage visible at the 3:35 mark.
Steve Cope I wonder if the ammunition survived till today
looks more like bomb damage. hull was bent in not out. but it was sunk by a us sub.
Impact damage not explosive. Plus torpedoes were designed to go off under the hull not poke a ship in the side. If it did the target area is under silt.
@@christophermckeon9030 The first part of the war the torpedoes were made to do that. But too many did not work. So we stopped using them and used contact. but even those had a problem. There is many books written about our poor quality torpedoes. Sad but true.
@@ritzvillelumber5122 Aye, that's true, but in Dec 1942 magnetic exploders were still being used on the majority of torpedoes as Bu-Ord was refusing investigation for CYA purposes...even tho some skippers removed the magnetic exploders against regulations. If you read the Triton's log they report in Dec 1942 one torpedo that exploded halfway to a target (a magnetic exploder issue), and four that hit or appeared to hit but failed to detonate (that's a contact exploder problem) (issuu.com/hnsa/docs/ss-201_triton, pp 142-43). These were different ships. One could surmise the Triton was firing a mix of torps that were magnetic and non-magnetic. Wikipedia notes this ship was sunk when one torp hit "under the stack" and another "under the foremast" but it isn't clear if the detonations were beneath the keel in those spots or contact hits along the hull, not to mention wikipedia contradicts the Triton's log.
looks like she was taken out by a torpedo from a US sub. Lots of thirsty soldiers after-I wonder if any of her crew made it?
Hope not
12 died
@@thearmoredgeorgian2736 How many survived?
@@wirelessone2986 not sure, I don’t do much research on ships anymore(I’m more into armor and planes now) and this was just a fact I scrounged up.
@@wirelessone2986 This type of ship would have had a crew of 30-50 men.
I ve seen too where they roll those barrels off trying get submarines back
Anyone know what sound track this is?
IH_Meditation (7min47sec) But it's no longer in the TH-cam Llibrary.
How deep is this?
What ship is that, doesn't look like any ive seen?
It was a Peacetime Standard Type (D) Class Auxiliary Water Tanker: www.combinedfleet.com/Amakasu_t.htm
@@2011ACVVV fair enough.
Looks like there’s one deck gun.
Is this a ww2 death ship?
Tanker in this case means water tanker
depth?
Сергей Задорожный
People are saying that the lack of fish means it is probably around 1000 meters deep.
All that damage will buff right out , no problem
Sunk off Salamaua Papua New Guinea in 1942. The first ship sunk by US Arial Torpedoes. I have dived this area but not so deep. I guess this wreck lies in 500m of water or more
Sunk by a SUBMARINE & 1000m deep...
Is that the IJN Shinano
It;s the Amakasu Maru 1
Depth?
Almost 1000 m.
I am pleased that you did not enter the vessel. There would have been Japanese sailors.
NOAA is always respectful when investigating and mapping wrecks.
Their policy is: don't touch, destroy or take anything.
You wouldn’t see any sailors in there, the human body completely dissolves in sea water after 3 years.
@@Kpoole35 Didn't Jacque Cousteau enter ships off Rabaul and film a compartment of bones and skulls? He called it "a vision of hell."
Whasnt that the one in google maps
The dash is the kanji character for the number one.
Anyone knows what type of ship is supposed to be
A water carrier.
AMAKASU MARU NO. 1. , launched in August 1939, was a 1,913-
ton, 271-foot long, 40-foot beam, Type D merchant vessel, the first of her class.
This wreck was clearly heavily damaged during the sinking, but I'm amazed that it's not covered in rusticles and the fact the name is still legible on the stern of the ship. It appears to me the ship is beginning to collapse because of the ravages of corrosion.
Probably due to the metals used (Steel vs Iron) and the layers of lead-based paint is why you aren't seeing "Rusticles". Another reason might be very different microorganisms in the different locations, colder Atlantic waters Vs. warmer Pacific waters.
@@stephenhoward6829 the explanation I heard was that depth makes the difference. Upper layers of the ocean have more bacteria in competition with each other and rusticle bacteria have an open field at the lower depths.
Chinese and japanese word some are same
I am going to take a wild guess. I believe what we are seeing is a fleet oiler. I am basing this on the shortage of large caliber guns and the lack of deck armour. Narration would have been nice. Does anyone know the ship's name yet?
The Amakasu Maru 1. A water tanker from port Yokohama.
Tender, water carrier. Small potatoes compared to a fleet oiler.
Why is all that white sand covering it? Is it in shallow water? Also odd there isn’t much marine growth all over it
It's sediment. Sand and organic particles from plants, animals and fish that sink to the depth.
We need a few of this underwater drones around the vicinity of the great Titanic......
There was an expedition August 2019. The deck house collapsed and the captain's bathtub is no longer visible. I saw it on TV not long ago, but I can't find that docu. Here a short clip: www.bbc.com/news/science-environment-49420935
@@2011ACVVV thanks a lot for sharing
its yokohama
How deep this was at?
Almost 1000 m
@@2011ACVVV Now-Tha`s deep!
10:44 what fish is that???
Anglerfish (Lophioidei) aka Goosefish
Disappointed, there was no narration. It could have been interesting.
@Blargenfladibblenohip ! Funny, they said Triton sank her off of Wake.
Hey NOAA, how about perfecting your forecasts before looking for sunken ships.
I'm not NOAA 🤣
Looks like a highly detailed model and the fish don't swim in ant of the motion shots....Hmmmmm?
The fish are typically stunned by the lights on the ROV.
Howie Felterbush And the moon landing was faked! 😂😂😂
Howie Felterbush And the moon landing was faked! 😂😂😂
It dosent look like akagi or kaga.
No shit. Did you even read the video description
Obviously not a warship. Probably a transport of some kind.
It's a water tanker.
Kaaboom.......bye.....
dai-ihi-amakasu-maru-yokohama SHIPsNAME
平方士敏 greetings from America to Japan.
Not much marine life?
That means it is an extremely deep depth.
Torpedo in za vater...most of the battle ship was snaked by those dreaded submarine....i have watched a lot of history show....an blah blah they always say she took a torpedo....almost 100 percent of the time
WTF. HOW DEEP IS IT????
They didn't say. But it was deep.
Nearly 1000 meters deep.
⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️
6:19 まあ一第 ?
ありがとう、私はそれを知りませんでした。日本語は面白い。
10:42 Fish says: "OK everybody, screw off! I'm the boss here now!!".
I was charmed by a first impression of the benign nature of freshwater tanker delivering the precious and vital, life-giving fluid to desert islands everywhere in the seawater world of the Pacific ONLY, no guns; absolutely orientally even, poetically wonderful to see here. Without its purpose to aid, abet and fuel fascist indiscriminate murdering savage barbarians in their historically unprecedented national mistake of all time, the charm is possible, and nice to see and think about here - what it could have been without the crazy ethnocentric fascism part of it all.
@Rusty Nail 120741? USN? haha?, . . . NEVER again. Infamous.
How Do They Know It's Japanese ?
Maybe by reading the text on the bow?? I don't think you've watch this video.
great video and pics.... music blows.....
Let's have a moment of silence for the poor low ranks that had to clean those decks, polish it's brass, and scrub the toilets 😐
第一あます丸？
think about this- using an rov to get a picture of an rov getting the picture!!!! an oxymoron???
richard cranium In fact the one filming the ROV is an ROV but it's also a weight. It's hanging on the main cable and the vessel drags it. The ROV on the sea floor is connected with the ROV above him but can operate on it's own without the influence from the surface waves. oceanexplorer.noaa.gov/technology/subs/seirios/seirios.html
第一？