OPV270. OCEA photo
Naval News reports that the French shipyard OCEA has launched the largest aluminum offshore patrol vessel ever constructed. It is going to the Philippine Coast Guard as part of a package deal that also included four much smaller patrol boats. The shipyard claims substantial lifecycle saving in fuel and maintenance as well as lower emissions due to the choice of building materials. (Note the underwater body on the after third of the ship. It looks unusual.)
Choice of an aluminum hull and superstructure does bring on discussion of the possible dangers of using aluminum, frequently blamed for serious damage due to fire including USS Belknap (CG-26) and loss of British type 21 frigates HMS Antelope and HMS Ardent and the destroyer HMS Sheffield during the Falklands War.
There are real issues with the use of aluminum, since it softens, melts, and looses its structural integrity at lower temperatures than steel, as seen on HMS Amazon when it had a fire in 1977, but losses as a result of structural aluminum have frequently been exaggerated. Problems with cracking of aluminum superstructures have been largely as a result of the different expansion rates of mixed steel and aluminum construction.
In the case of Belknap, the collision severed fuel lines running outboard on the carrier and dumped huge amounts of fuel onto the ship, feeding the fire, while ammunition cooked off. Nevertheless the ship was saved by extraordinary DC effort.
The loss of Antelope and Ardent were evaluated to have not been the result of their Aluminum superstructure.
The Sheffield actually employed steel rather than aluminum in both its hull and superstructure, so aluminum construction played no part in her loss.
OPV 270 main specifications
- Overall length : 84.00 m (275.5′)
- Range : 8000 nm @ 12 kts
- Endurance : 5 weeks
- Speed : 22.0 knots
- Crew : 40 persons
- Passenger and VIP : 26 persons
- Survivors : 35 persons
A Suriname Coast Guard FPB 98 patrol boat (Credit: OCEA)
Naval News reports that Ukraine has announced they are in negotiations for joint production of 20 Patrol Boats to a French OCEA design for their “Sea Guard of the State Border Guard Service,” their coast guard. Sounds like it is a done deal with only minor details to work out.
As noted in the report, the Algerian Navy bought 21 of these and has ordered ten more.
They have a GRP hull and are powered by two 3,660 HP Caterpillar diesels using waterjets. Specs on the Algerian boats as follows.
- Displacement: 100 tons
- Length: 31.8 meters (104’4″)
- Beam: 6.3 meters (20’8″)
- Draft: 1.2 meters (3’11”)
- Speed: 30 knots
- Range: 900 nmi @ 14 knots
- Crew: 13
Most of these boats are armed with a single auto-cannon forward. In most cases a 20mm, the Algerian boats have a 30mm. Given the Ukranians’ tensions with Russia, curious to see if they may choose to provide more weapons.
We have seen products from OCEA before. They provided four smaller patrol boats to the Philippine Coast Guard. These boats like those that went to the Philippines have provision for a RHIB launched by davit.
Earlier, when I discussed developing a WPB replacement, I was primarily concerned that in addition to a SAR response, that the Coast Guard in major ports have a response to unconventional maritime attacks by terrorists or other hostile forces. But there are also a number of WPBs in small ports where such attacks would have far less impact and consequently are far less likely. The US shipbuilder Metal Shark has new 87 foot patrol boats in series production for Foreign Military Sales (FMS) that were evolved from the Marine Protector class. They might fulfill the needs of these smaller ports. They appear to be relatively cheap. Looks like the last group had a cost per boat of about $4.3M each. That is way less than the approx. $60M we are paying for the more capable FRCs. Still there might be a better alternative,
A recent Marine Log report that the EU is buying nine large motor lifeboats to help the Turkish Coast Guard deal with their immigrant crisis, got me to thinking that perhaps, at these small ports, what is really needed is a larger motor lifeboat. Specs for the Damen designed Turkish Coast Guard boats are here. They are apparently a version of the Netherlands own motor lifeboat.
Damen SAR 1906 motor surf boats
There has been a lot of work on development of Motor Surf Boats since the 47 footers and the now over 50 year old 52 footers. Canada and the Netherlands have both made such craft over 60 feet in length. The RAFNAR hull form looks particularly promising. They may not be more survivable than the ones we have now, but they may be better in other ways. Where we don’t need the long term endurance of a WPB, we could have a boat of about Marine Protector class size or perhaps some what smaller, that could operate with a smaller crew, be faster, tow equally large or larger vessels, reduce G-forces on the crew, and still be able to operate in weather where the legacy WPBs could not. There might also be Foreign Military Sales potential for such a vessel.
Baird Maritime has reported that the Bangladesh Coast Guard has taken delivery of three new cutters.
These are based on the Bangladesh Navy’s Padma-class patrol vessels
They are similar in size to the Webber class Fast Response Cutters. Specs for the Bangladesh vessels are:
- Displacement: 350 tons
- Length: 165.35 ft (50.40 m)
- Beam: 24.61 ft (7.50 m)
- Draft: 13.45 ft (4.10 m)
- Speed: 23 knots
- Endurance: 7 days
- Crew: 45
Armament for the Coast Guard versions of vessel is two Oerlikon 25mm, while that for the Navy version is two 37mm and two 20mm. They are also reported to be capable of minelaying.
Wikipedia indicates up to 23 of these indigenously produced craft are planned (presumably Navy and Coast Guard).
At MAST Asia 2019, the defense exhibition and conference currently held near Tokyo, Japan, local shipbuilder Mitsui Engineering & Shipbuilding (Mitsui E&S) unveiled its OPV design currently competing for a JMSDF requirement.
Naval News reports on a proposal to meet Japanese Maritime Self Defense Force requirement for Offshore Patrol Vessels
This looks like a pretty typical modern Offshore Patrol Vessel if a bit larger and faster than most, with its medium caliber gun, two remote weapon stations for heavy machine guns and helo deck. In fact it looks very much like an improved L’Adroit with it 360 degree vision bridge, integrated mast, and two boats launched from stern ramps .
The real surprise is the crew of 23, one less than the crew of a Webber class. This might not be quite representative of how the Coast Guard would figure the crew size since there is a possibility the law enforcement officers of the boarding party and the aviation support personnel that are part of a USCG crew, may be handled as visiting detachments rather than as crew by the Japanese. Still the crew is going to be less than half of that of a 270.
Since the crew is a large part of the life cycle cost of a ship, there is a natural desire to cut the size of the crew. In operating a ship, frequently there is no reason the size of the ship should be reflected in the size of the crew, if the tasks the crew performs are the same. Still, 23 hardly provides a decent damage control party. Can they operate the helicopter and both boats simultaneously? Having junior personnel aboard in an apprentice role has much to recommend it. The experience of the Navy in attempting to man the LCSs with a minimum crew looks like a cautionary tale. I just hope they are including some provisions for adding personnel.
Just a series of presentation slides from almost a year ago. No news and probably has no immediate application, but a guide to the Navy organization, I did not want to loose.
Thanks to Lee for providing this.
Launch of USCGC Mackinaw (WLBB-30) on April 2, 2005. Photo by Peter J. Markham.
Marine Link reports that,
“The Great Lakes-St. Lawrence shipping industry is calling for at least five new icebreakers to be part of the (Canadian–Chuck) federal government’s recent announcement of $15.7 billion for Canadian Coast Guard fleet renewal.”
This appeal was addressed to the Canadian government, but we can expect to hear continued appeals for more USCG icebreakers on the lakes as well.
“Canadian and U.S. Coast Guard crews worked tirelessly during the Great Lakes spring break-out, but were hampered by the age and condition of the fleets at their disposal. Two U.S. Coast Guard icebreakers were out of service in March and a Canadian icebreaker assigned to Lake Superior was only able to operate at 60 per cent of capability and was idled in April due to mechanical issues.”
Congressmen from states bordering the Great Lakes have been asking for more icebreakers for years. There was $5M in the FY2019 budget to start work on procurement of a Great Lakes icebreaker at least as capable as USCGC Mackinaw.
There is an indication that the system may be expanded and the navigation season extended,
That economic contribution is only set to increase as ports and their customers invest in increasing the capacity of the waterway as well as looking at options like lengthening the navigation season of the St. Lawrence Seaway.
There might be an opportunity here to combine the program to provide medium polar icebreakers with a new icebreaker for the Great Lakes. The Great Lakes icebreaker might serve as a prototype for the medium polar icebreaker.