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Schematic view of the bow of a ship, showing: A the martingale stay, B the dolphin striker and C the bobstay. A dolphin striker (an older term for a martingale boom or simply a martingale; sometimes called a striker) is a small vertical or near vertical ancillary spar spanning between the bowsprit and martingale thereby redirecting the tension in the forward end of the martingale slightly more ...
This page was last edited on 1 November 2020, at 14:49 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
A bobstay is a part of the rigging of a sailing boat or ship. Its purpose is to counteract the upward tension on the bowsprit from the jibs and forestay. A bobstay may run directly from the stem to the bowsprit, [1] or it may run to a dolphin striker, a spar projecting downward, which is then held to the bowsprit or jibboom by a martingale stay.
The Portsmouth Naval Shipyard (PNS), often called the Portsmouth Navy Yard, is a United States Navy shipyard on Seavey's Island in Kittery, Maine, bordering Portsmouth, New Hampshire. The naval yard lies along the southern boundary of Maine on the Piscataqua River. Founded on June 12, 1800, PNS is the U.S. Navy's oldest continuously operating ...
Dolphin was the penultimate design in the V-boat series. With a length of 319 ft (97 m) and a displacement only a little more than half that of the previous three large cruiser submarines (1,718 long tons (1,746 t) surfaced, 2,240 long tons (2,276 t) submerged), Dolphin was clearly an attempt to strike a medium between those latter submarines and earlier S-class submarines, which were little ...
The boat has a draft of 1.54 ft (0.47 m) with the daggerboard extended and 3 in (7.6 cm) with it retracted, allowing beaching or ground transportation on a trailer or car roof rack. [ 3 ] For sailing the design has hiking bars , a high freeboard and a molded splashguard in front of the mast.
The Harbor Defenses of Portsmouth was a United States Army Coast Artillery Corps harbor defense command. [1] It coordinated the coast defenses of Portsmouth, New Hampshire and the nearby Portsmouth Naval Shipyard in Kittery, Maine from 1900 to 1950, both on the Piscataqua River, beginning with the Endicott program.
After the surrender of Germany, the U-boat made for the closest Allied port and surrendered to US forces in Portsmouth, New Hampshire on 17 May 1945. In August 1945 U-1228 was awarded to the United States and after being tested, she was sunk by USS Sirago on 5 February 1946 in position 42°32′N 69°37′W / 42.533°N 69.617°W ...