Speculation and facts on future Chinese vessels

no_name

Colonel
its an ocean surveillance ship (intelligence gathering!) but seems to be specialized for underwater signature tracking and classification.

I though you might be asking a rhetorical question because the impeccable was the ship that got it's tow sonar cable cut by chinese 'fisherman' in the hainan incident a few years back.
 

Geographer

Junior Member
I though you might be asking a rhetorical question because the impeccable was the ship that got it's tow sonar cable cut by chinese 'fisherman' in the hainan incident a few years back.
The cable was not cut. Some Chinese sailors were photographed with a grappling hook under water but there were no reports of it snagging anything. You might be confusing it with the recent incident where a Chinese ship did cut an underwater cable being laid by a Vietnamese ship near the Spratly Islands.
 

bd popeye

The Last Jedi
VIP Professional
What is the "jobscope" of USNS Impeccable actually?

Directly from the US Navy;

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Ocean Surveillance Ships - T-AGOS

Description
Ocean surveillance ships gather underwater acoustical data. The T-AGOS ships are operated by Military Sealift Command to support the anti-submarine warfare mission of the commanders of the Atlantic and Pacific Fleets.

Features
The two classes of surveillance ships use surveillance towed-array sensor system (SURTASS) equipment to gather undersea acoustic data. The ships also carry electronic equipment to process and transmit that data via satellite to shore stations for evaluation. Victorious-class ocean surveillance ships are built on a small-waterplane, twin-hull, or SWATH, design for greater stability at slow speeds in high latitudes under adverse weather conditions. Impeccable has a hull form based on that of Victorious, but has a more powerful propulsion plant and is designed specifically for deploying an additional active towed-array system.

Background
The ships are operated and maintained by civilian contractors for the Military Sealift Command. A contract for the first SWATH ship, T-AGOS 19, was awarded in November 1986, and options for the next three were exercised in October 1988. The keel for the first Impeccable class was laid down Feb. 2, 1993. Ship was more than 60 percent completed when the shipyard encountered difficulties. The contract was sublet to Halter Marine on April 20, 1995 to complete the ship. Impeccable finally entered MSC service in October 2001.

General Characteristics, Impeccable Class
Builder: Tampa Shipyard/Halter Marine.
Propulsion: Diesel-electric; three diesel generators; 2 Westinghouse motors; 5,000 horsepower; twin screw shaft; 2 omni-thruster hydrojets; 1,800 horsepower.
Length: 281.5 feet (85.8 meters).
Beam: 95.8 feet (29.2 meters).
Displacement: 5,370 tons (5,456.18 metric tons) full load.
Speed: 13 knots, 3 knots when towing.
Crew: 20 mariners, 5 technicians and up to 20 Navy personnel.
Homeport: No homeport assigned.
Ships:
USNS Impeccable (T-AGOS 23), No homeport assigned.

The US Navy also has 4 Victorious class Ocean Surveillance Ships.
 

i.e.

Senior Member
Directly from the US Navy;

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The US Navy also has 4 Victorious class Ocean Surveillance Ships.



I also remember they were to replace some of the function of the SOSUS net especially with regards to SOSUS performance in littoral. mobile SOSUS in littoral if you will.

SOSUS was good at open ocean choke points, UK-Iceland-greenland gap for example, but not so near shore.

thus the extreme sensitivity when Impeccable was towing a huge sonar array (some say it was also active) near one of china biggest nuclear sub base...

I mean, sorry to make an observation but, they had it coming.
 

i.e.

Senior Member
The cable was not cut. Some Chinese sailors were photographed with a grappling hook under water but there were no reports of it snagging anything. You might be confusing it with the recent incident where a Chinese ship did cut an underwater cable being laid by a Vietnamese ship near the Spratly Islands.

There is a open bounty in Chinese coastal fisherman community for any equipment belong on those ships.

and the miles long cable they tow do get tangled with trawler nets. so I wouldn't be surprised if there is a genuine hostility towards those ships.

besides they were towing a sonar some 90 nms from Sanya.
they had it coming.

I mean if a PLAN ship manned by chinese civilian "contractors" were towing a mile long sonar near kingsbay or Bangor/Kitsap or Norfolk. with the explicit purpose of tracking USN boomer subs. what would be USN's reaction?

I find it difficult sometimes to put some people in other people's shoes, to make them go beyond the reflective moral indignation driven by pure nationalism.
 

delft

Brigadier
i.e. wrote:
I mean if a PLAN ship manned by chinese civilian "contractors" were towing a mile long sonar near kingsbay or Bangor/Kitsap or Norfolk. with the explicit purpose of tracking USN boomer subs. what would be USN's reaction?

I would expect USN to be seriously upset and that two dozen Senators and Congress men to scream bloody murder.
 

Spartan95

Junior Member
A larger picture of the catamaran from
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:

1307796024_50802.jpg


The author calls it a T-AGOS ocean surveillance ship.

The shipyard is building a SWATH (Small Waterplane Area Twin Hull) ship!

This is a novel hull form that is new and few shipyards in the world have experience building. Impressive work!

By the way, that's the same hull form as the USNS Impeccable (of the incident near Hainan a few years back).
 

Nicopipo

Just Hatched
Registered Member
Hi everyone,
in the frame of my studies, I am conducting an international survey about Naval Navigation Equipment. Please take five minutes of your time to answer 4-5 questions by following this link:
//spreadsheets.google.com/spreadsheet/viewform?formkey=dE12dmluTVl1Z1lTRUlIR3E4U3VNbmc6MQ

The more answers, the more relevant the results !

Many thanks for your help.

Best regards.

Nicolas.
 
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