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FIGHTING SHIPS OF THE WORLD
UNITED STATES OF AMERICA
COASTAL FORCES
"Osprey" patrol boats (PTF23) (1968)


Photo





Ships


No Name Yard No Builder Laid down Launched Comm Fate
95PB681 PTF23   Sewart Seacraft, Berwick     1968 stricken 1986
95PB682 PTF24   Sewart Seacraft, Berwick     1968 stricken 1985
95PB683 PTF25   Sewart Seacraft, Berwick     1968 stricken 1979
95PB684 PTF26   Sewart Seacraft, Berwick     1968 stricken 1990


Technical data


Displacement standard, t80
Displacement full, t105
Length, m

28.8

Breadth, m7.00
Draught, m2.10
No of shafts2
Machinery2 Napier-Deltic diesels
Power, h. p.6200
Max speed, kts40
Fuel, tdiesel oil
Endurance, nm(kts) 
Armament1 x 1 - 40/60 Mk 3, 2 x 1 - 20/70 Mk 10, 1 x (1 - 81/12 M29 mortar + 1 - 12.7/90)
Electronic equipmentradar
Complement19


Graphics





Project history

Under FY67 the Navy bought four 'Ospreys' (PTF23-26) from Sewart Seacraft of Berwick, Louisiana. They were a commercial, aluminium (rather than wooden) hulled design, sometimes described as improved versions of the 'Nasty'. Although reportedly not completely successful, they were not sold until the 1990s. (PTF25 was experimentally fitted with gas turbines in 1978, stricken in 1979.) They could be configured as torpedo-boats, minelayers, or submarine chafers.

Modernizations

1978, PTF25: was re-engined with gas turbines.

Naval service

No significant events.

Ivan Gogin, 2015