Fuel weight 341.2 LT. Dimensions 404.0 x 41.3 x 13.9 x 13.8 (freeboard) feet. Range 2,050 (at 30 knots)-800 (at 50 knots) nautical miles.
Performance of a representative DFM-fuelled Patrol frigate (PF) in 1975. Displacement 3,000 light tons. Dimensions 406 (waterline) x 41.5 (waterline) x 13.8 (ship draft) x 14.2 (ship freeboard) feet. Propulsion 1 screw. Horsepower 40,000 hp. Maximum speed 31 knots. DFM fuel weight 315 LT. Cruising speed 20 knots. Range at cruising speed 4,000 nautical miles based on 10 percent fuel reserve rounded to nearest 50 nautical miles.
Patrol frigate (PF) general applicable for the next specific warfare areas:
ASMD=self protection against anti-ship missiles
ASW (P)=force protection against subsurface threats
AAW=force attribution of airborne threats
ASUW=warfare against surface ship threats
EW=electronic warfare
CDS=combat direction systems
SURV=surveillance
NGFS=naval gunfire support
MIW=mine warfare
SPW=special warfare
Principal mission characteristics
Mission: sea control task force defense
Duration in day: 24.4
Range in nautical miles: 12,000
Mission description: escort of task force to/from operation area. Five days patrol in operation area. Divert twice/day in transit for sub contacts.
Ship operational parameters
Days in transit:
Transit day profile hours: 20
Transit day profile in knots: 20
Transit day profile in nautical miles: 400
Days in op area: 5
Op area day profile in hours: 20
Op area day profile in knots: 16
Op area day profile in nautical miles:320
Total time at speed in hours: 100
Total time at speed in knots: 16
Ship operational parameters
Days in transit: 19.4
Transit day profile hours: 4
Transit day profile in knots: 29
Transit day profile in nautical miles: 116
Days in op area: 5
Op area day profile in hours: 4
Op area day profile in knots: 20
Op area day profile in nautical miles: 80
Total time at speed in hours: 408
Total time at speed in knots:20
Source
Hydrogen. Hearings before the subcommittee of energy research, development and demonstration of the committee on science and technology U.S. House of Representatives. Ninety-fourth congress, first session June 10 and 12, 1975, p. 1027 and further
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