This is in response to Bill Smith’s suggestion, ” I’d love to see 1 page with each of the design’s made public so far shown. It would make a great comparison of the concepts.”
No new information here, but it will, hopefully, make it easier to find some of the information already presented, including some that might have been given only in the comments.
Unfortunately the information is very limited. There have been almost no specifics provided for any of the designs. Only Vigor has chosen to discuss the details of their design, with its Ulstein X-bow. It is reported to have a length of 328 feet, a beam of 54 feet, a draft of 16.5 feet, and a max speed of 22knots. That is a relatively large ship. I do like its volume and the reconfigurable space they included. Their concept is discussed here: “Unconventional Contender for the Offshore Patrol Cutter”
VT Halter has partnered with DCNS. A concept that accompanied their announcement is discussed here: “VT Halter Marine and DCNS to Partner for OPC Bid.” Their proposal appears to be similar to the ships DCNS has designed to fulfill a Malaysian requirement for six “Littoral combat Ships.” Those ships are reported to be 107 meters long, a 16 meter beam, and 2,750 ton displacement.
The only information we have from Huntington Ingalls is this photo from a DefenseNews.Com report.
Bollinger seems likely to use a Damen design, as they did for the 87foot WPBs and the 154 foot WPCs. We have seen artists renderings of the Netherlands Navy’s Holland Class OPV in Coast Guard colors, and we have also seen a rendering of an upgraded Bollinger shipyard with a Holland Class under construction, but so far I have seen no announcement of what design they will actually build. I have always felt the Holland class was a bit more ship than the Coast Guard could afford for a class that emphasizes “affordability,” and is expected to cost about half of what the NSC costs. Damen has a large portfolio of designs that they discuss here: http://offshore-patrol-security.com/cms-assets/documents/59716-108335.damen-opv-presentation-portsmouth-2012.pdf Of the designs presented the 2400 and 2600 tons designs appear closest to Coast Guard specifications but even they would likely have to be modified. There is a rendering of a cutter in Coast Guard colors on the last page.
Marinette Marine‘s concept is reported here: http://www.marinettemarine.com/opc.html As part of the Fincantieri Group it appears they may be offering a modified version of the Italian Navy’s Commandante Class patrol vessel. An obvious difference is that the Marinette Marine concept has the bow raised a deck. No specs were provided for OPC concept. Below are the specs for the Italian vessels which would almost certainly have to be enlarged to meet the range and seakeeping requirements of the OPC program.
- Crew: 80 total including 8 officers
- Overall Length: 88.4m (292 ft)
- Length at Waterline: 80.3m (265 ft)
- Beam: 12.2m (40.26 ft)
- Draught: 4.6m (15.2 ft)
- Full Load Displacement: 1,520 tons
- Armament: 1×76 mm, 2x25mm
- Speed: 25 knots
- Range: 3,500 nmi
- Helo deck and hanger for NH90 (essentially the same size as an MH-60)
Eastern has published a conceptual rendering as a single page pdf discussed here: https://chuckhillscgblog.net/2013/06/11/easterns-opc-concept/ It is limited to some drawings depicting the interior and one exterior viewed as if the observer was in an elevated position off the ship’s starboard bow.
So far I have seen no information about the proposals from NASSCO or Bath Iron Works.
