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Thread: The latest large armed ocean patrol vessels

  1. #1
    the internet is serious business! Ought Six's Avatar
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    Arrow The latest large armed ocean patrol vessels

    There is a blurry line between a combatant like a frigate, corvette or missile boat/FAC, and an armed ocean patrol vessel. Of course, designs vary due to local need, but the missions of these ocean patrol ships and full combatants are different, but can overlap significantly. For instance, drug interdiction in America is a mission for both our Coast Guard and Navy. Another example is counter-piracy operations. Another is search and rescue. These vessel are also sometimes deployed overseas in multinational task forces alongside naval vessels. In times of war, they are deployed in enemy waters just as our Navy is. In a few cases, armed ocean patrol craft are dual mission patrol/navy combatant ships.

    Most nations with a significant amount of coastline and a serious military budget seem to have designated ocean patrol vessels. These vessels seem to be a critical part of a nation's defense forces, especially in this age of asymmetrical warfare through terrorism, yet they are largely ignored by naval analysts and affectionados. In this thread, I wanted to look at some of the newer designs for larger (~500 ton displacement and up) armed ocean patrol vessels, and hopefully stimulate a little discussion on their features, capabilities and mission.


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    Legend-class national security cutter Berthold (USA)



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    Comandanatte-class ocean patrol vessel (Italy)


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    Gumdoksuri-class PKX patrol vessel (South Korea)


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    Can Nicobar-class patrol vessel / FAC (India)


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    Surya-class ocean patrol vessel (India)


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    Hida-class patrol vessel (Japan)


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    Aso-class patrol vessel (Japan)


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    Kedah-class offshore patrol vessel (Malaysia)


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    Sierra-class oceanic patrol corvette (Mexico)


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    Oaxaca-class patrol vessel (Mexico)


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    Holland-class offshore patrol vessel (Netherlands)


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    Protector-class offshore patrol vessel (New Zealand)


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    Barentshav-class offshore patrol vessel (Norway)


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    Viana do Castelo-class patrol vessel (Portugal)


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    Pattani-class ocean patrol vessel (Thailand)


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    River-class offshore patrol vessel (United Kingdom)

  2. #2
    Senior Member Orocairion's Avatar
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    Guicamacuto class Patrol Vessel, around 1700t full



    Caribe class Ocean Patrol Vessel, about 2500t full load.


    The curious thing about this class is that it has power and space available to be "upgraded" to corvettes/frigates later on.

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    Durango class offshore patrol vessel (Mexico)

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    Senior Member DPM_Sheep's Avatar
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    Trinidad and Tobago currently have 3 new OPV/Coast Guard cutters under construction on the Clyde. Hopefully they won't change their mind about needing some like Brunei did.

    http://www.upperclydeshipping.com/20...-progress.html

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    Senior Member Orocairion's Avatar
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    The Durango class seem like a bigger version of the Sierra class. Or rather, the Sierra class is a smaller version of the Durango class.

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    Quote Originally Posted by Orocairion View Post
    The Durango class seem like a bigger version of the Sierra class. Or rather, the Sierra class is a smaller version of the Durango class.
    Durango class ships are patrol vessels with the length of 81 meters, while the Sierra class ships are frigates with the length of 71 meters,

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    I suspect the Japanese ones are going to support the whaling fleet in the antarctic this winter.

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    the internet is serious business! Ought Six's Avatar
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    O:
    "Guicamacuto class Patrol Vessel, around 1700t full"
    ---
    "Caribe class Ocean Patrol Vessel, about 2500t full load."
    Thanks for the additions. For those wondering, these vessels are operated by Spain. {Correction: Operated by Venezuela, built in Spain. See below}
    ----------
    "The curious thing about this class is that it has power and space available to be "upgraded" to corvettes/frigates later on."
    Not so odd. A more heavily-armed verison of the Italian Comandante-class has been sold to the UAE as an ASW corvette. Also, the Malaysian Kadah-class is a more lightly-armed Meko 100 corvette. As I said, the line is blurry....

    [center]=====================================================================================[/center]

    ec:
    "Durango class offshore patrol vessel (Mexico)"
    Thanks for the addition.
    ----------
    "Durango class ships are patrol vessels with the length of 81 meters, while the Sierra class ships are frigates with the length of 71 meters,"
    Both are designed primarily for drug interdiction duties, and are armed only with guns.
    Last edited by Ought Six; 07-11-2010 at 04:44 AM.

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    Senior Member signatory's Avatar
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    Nice collection.

    posted over at strictly photos

    [IMG]http://i40.*******.com/oi999tdotjpg[/IMG]

    Swedish warship EUNAVFOR flagship HMSwMS Carlskrona, Tuesday, May 11, 2010. off the coast of Somalia. The Carlskrona is flagship of the EUNAVFOR (European Naval Force Somalia) tasked with protecting World Food Program shipments to Somalia, as well as hunting pirates off the coast of Somalia. (AP)

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    the internet is serious business! Ought Six's Avatar
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    s:
    "Swedish warship EUNAVFOR flagship HMSwMS Carlskrona, Tuesday, May 11, 2010. off the coast of Somalia. The Carlskrona is flagship of the EUNAVFOR (European Naval Force Somalia) tasked with protecting World Food Program shipments to Somalia, as well as hunting pirates off the coast of Somalia."
    I left out a lot of older patrol ships, as I was focusing on newer designs. Perhaps the Carlskrona qualifies, though, as it was completely refitted seven or eight years ago, its mission being changed from minelayer to ocean patrol vessel.

    [center]================================================================================[/center]

    A better pic of the Dutch Holland-class, posted by Kaaskop on the 'Beautiful Ships' thread. Beautiful, indeed.


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    Senior Member Orocairion's Avatar
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    Quote Originally Posted by Ought Six View Post
    O:Thanks for the additions. For those wondering, these vessels are operated by Spain.
    Built by Spain for the Venezuelan Navy, actually. Both classes.
    ----------

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    Thank you for the correction.

    [center]=======================================================================[/center]

    So from what I gather, most of these ocean patrol vessels seem to share some common characteristics.

    - Lighter armament. Most are armed with gun systems only, with a few having anit-ship missiles and/or light air defenses. None seem to have serious air defense suites, ASW systems or long-range anti-ship missiles. The defensive countermeasures also are less robust or not present at all.
    - Less advanced electronics. This makes sense, as it is unlikely these vessels will have to deal with jamming, or have to detect very small targets like incoming cruise missiles. Also, the kind of advanced comms needed for military operations are not required with this mission.
    - Diesel engines only. Most do not have gas turbines, and most will not do much over 20 knots. The focus seems to be more on range and fuel economy than speed.
    - Built to commercial instead of military standards. This is an obvious cost savings feature.

    While these ships are built for a different mission, in times of need, some are designed to easily be fitted with heavier and more sophisticated weapons.
    Last edited by Ought Six; 07-11-2010 at 05:07 AM.

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    These are the patrol vessels of ROK Coast Guard.



    Taeguk-class offshore patrol vessel (500 tons empty displacement, 12 in service)



    Hankang-class offshore patrol vessel (1,000 tons empty displacement, 9 in service)



    Jaemin-class ocean patrol vessel (1,500 tons empty displacement, 12 in service)



    Tapyeongyang-class ocean patrol vessel (3,000 tons empty displacement, 12 in service)



    Sambong-class ocean patrol vessel (5,000 tons of empty displacement, 1 in service)

    Other patrol vessels of ROKN aside from Gumdoksuri class:



    Chamsuri-class patrol boat (180 tons empty displacement, 80 in service)



    Pohang-class patrol combat corvette (1,300 tons full displacement, 22 in service)



    Donghae-class patrol combat corvette (1,100 tons full displacement, 3 in service)

    Here's the updated profile of Gumdoksuri class. The stealth feature is now more streamlined.


  14. #14
    the internet is serious business! Ought Six's Avatar
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    Thanks for the additions. Nice pics.

    And that is another feature you will see on coast guard vessels you generally do not see on navy ships; firefighting monitors.

    The Gumdoksuri-class is an interesting one. It is atypical for patrol vessels because it is very fast (40+ knots) and armed with Harpoon-equivalent anti-ship missiles, a 76mm rapid-fire cannon and a secondary twin-40mm mount suitable for CIWS work, all in a vessel under 500 tons displacement. It is really more of a fast attack craft. But with its CODAG propulsion, it can cruise economically for regular patrol duties. Having North Korea and China for next door neighbors, I can understand having your patrol vessels designed for dual use, patrol/combat.

    Another interesting one is the Holland-class, which has a sophisticated, expensive military RADAR, and the ship is armored. This suggests a dual-use combat capability. One must suspect the vessel is designed to be easily upgraded with heavier weapons.
    Last edited by Ought Six; 07-11-2010 at 05:36 AM.

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