| modification of LSM 1 - 558 series: | |
| Displacement | 743 tons beaching; 941 - 1084 tons full load |
| Dimensions | 196½ (w.l.) 203½ (o.a.) x 34½ x 7½ (max) feet |
| Guns | 1 - 5 inch, 4 - 4.2 inch mortars; 2 - 40mm AA; numerous rocket projectors |
| Machinery | Diesel; 2 shafts; B.H.P.: 2800 = 12 kts. |
| Complement | ship's company: 81 - 138 |
| Notes | 50 of the LSM 1 - 558 series were rated as LSM(R). Some have been fitted with Kirsten cycloidal propellors, enabling them to turn 360º and remain in the same position. |
| US Coast Defense Monitors - 1876 class. | |
| Displacement | 3990 tons |
| Armament | 4 - 10" 2 - 6pdr. |
| Armor | iron belt: 7" turrets: 11.5" steel |
| Machinery | Designed H.P.: 1600 = 12kts. Coal (tons): Miantonomah: 250 Terror: 276 |
| Complement | Miantonomah: 183 Terror: 229 |
| Notes |
Units: USS Miantonomoh - (1876) USS Terror - (1883) |
| US Coast Defense Monitors - 1883 class. | |
| Displacement | 3990 tons |
| Armament | 4 - 10" .30cal. 2 - 4" .40cal. 2 - 3pdr. 2 - 1pdr. |
| Armor | iron belt: 9" steel turrets: 11.5" - 7.5" |
| Machinery | Designed H.P.: 1600 = 10.5kts. Coal (tons): 271 |
| Notes |
Units: USS Amphitrite - (1883) - to Louisiana Naval Militia in 1914. USS Monadnock - (?) - listed as Submarine Depot Ship in 1914 prior to decommissioning. |
| US Coast Defense Monitors - 1891 class. | |
| Displacement | 4084 tons |
| Armament | fore turret: 2 - 12" .35cal. after turret: 2 - 10" .30cal. 6 - 6pdr. 1 - 1pdr. |
| Armor | Armourer: Harvey belt: 13" - 5" turrets: 8" fore turret base: 13" after turret base: 11.5" |
| Machinery | Babcock boilers Designed H.P.: 5000 = 14kts. Coal (tons): 211 |
| Complement | 228 |
| Notes |
Units: USS Monterey - (1891) |
| US Coast Defense Monitors - 1901 class. | |
| Displacement | 3235 |
| Dimensions | 252 x 50 x 12.5 feet (mean draft) |
| Armament | 2 - 12" .40cal. 1 - 3" (AA) 2 - 6/3pdr. 2 - 1pdr. |
| Armor | Armourer: Krupp 11" belt and turret |
| Machinery | H.P.: 2400 = 12kts coal (tons): Ozark: 304 Tallahassee: 344 Tonopah: 346 Cheyenne: 132 + 60,816 gallons of fuel oil |
| Complement | 237 |
| Notes |
Units: USS Tonopah - (1901) USS Cheyenne - (1900) USS Ozark - (1901) USS Tallahasse - (1901) |
| Displacement | 500 - 615 (full load) tons |
| Dimensions | 200' x 25.5' x 7.25' (8.5' full load) |
| Armament | 2 - 4inch (.50 cal) 2 - 3" A.A. 2 - m.g. 1 - Y gun + depth charges |
| Machinery | Ljungstrom turbine with planetary reduction gear. boilers: 2 Sterling w.t. designed h.p.: 2500 = 18 kts. fuel: coal: 105 tons oil: 45 tons range: 3500 miles at 10 kts. |
| Complement | ship's company: 72 |
| Builder(s): | Assembled by Ford Eagle Boat Plant, River Rouge; (1918 - 19) machinery and fittings by Ford Plant, Highland Park, Detroit |
| Notes | Eagle 1 - 4, 6 - 14, 16 - 24, 27 - 34 Eagle 36 - 44, 46 - 54, 56 - 60, 61 - 112 Units 5, 15, 25, 35, 45, 55, 65, 75, 85, 95, 112 sold to Italy. Remaining units in the 61 - 112 range were canceled. |
| PEGASUS Class (PHM-1) | |
| Displacement | 255 tons full load |
| Dimensions | L.O.A.: Foils extended, 133 feet L.O.A.: Foils retracted, 145 feet Beam: 28 feet; Draft: ?? |
| Armament | 8 Harpoon missiles; 1 - 76mm gun |
| Machinery | Foilborne: 1 gas turbine; waterjet propulsion units: s.h.p.: 18,000 = 40+ kts. Hullborne: 2 diesels; waterjet propulsion units; b.h.p.: 1,600 = 12 kts. |
| Complement | ship's company: 25 |
| Builder(s) | Boeing Marine Systems |
| Notes | COMMENTARY: The six PHMs of the Pegasus class form a single squadron which operate from Key West. They are the Navy's fastest ships when foilborne and driven by their single gas turbine. They have good range on their diesels, excellent seakeeping qualities, amazingly fast response to requirements for speed, and a potent punch. Since becoming operational, they have established an unusually high availability rate while participating in a variety of missions, including significant involvement in the national drug interdiction program. PEGASUS Class: Units (6) as of 1994: USS Pegasus (PHM-1); Key West, Fla. USS Hercules (PHM-2); Key West, Fla. USS Taurus (PHM-3); Key West, Fla. USS Aquila (PHM-4); Key West, Fla. USS Aries (PHM-5); Key West, Fla. USS Gemini (PHM-6); Key West, Fla. |
| Small Gunboat for service in the Phillipines. Captured in the Spanish War. | |
| Displacement | 620 tons |
| Armament | 4 - 4inch 4 - 3pdr. |
| Machinery | speed = 11 kts. coal: 98 tons |
| Complement | ship's company: 99 |
| Notes | Eclano (1885) |
| Small Gunboats for service in the Phillipines. Captured in the Spanish War. | |
| Displacement | 243 tons |
| Armament | 4 - 3pdr. Callao unarmed. |
| Machinery | speed = 10 - 10.5 kts. coal: 33 tons |
| Notes | Callao (1888) Pampagna (1888) Samar (1888) |
| Small Gunboats for service in the Phillipines. | |
| Displacement | 360 tons |
| Armament | 4 - 3pdr. |
| Machinery | designed h.p.: 550 = 11 kts. coal: 70 tons |
| Complement | ship's company: 56 |
| Notes | Quiros (1895) Villalobos (1896) |
| Small Gunboats for service in the Phillipines. | |
| Displacement | 350 tons |
| Armament | 3 small Q. F. |
| Machinery | designed.h.p.: 450 = 10 kts. |
| Complement | ship's company: 25 |
| Builder(s) | Uraga Dock Co. (1902-03) |
| Notes | Units: Romblon Bobol Cebu Jolo Marie Duque |
| Small Gunboats for service in the Phillipines. | |
| Displacement | 190 tons |
| Armament | 2 - 6pdr. 6 - m.g.. |
| Machinery | 2 sets vert. compound boilers: 2 - Babcock designed h.p.: 800 = 13.25 kts. coal: 34 tons |
| Complement | ship's company: 47 |
| Builder(s) | built by Mare Island Navy Yard and re-erected by Shanghai Dock and Engineering Co. |
| Notes | Monocacy (1914) Palos (1914) |