| WWI SC-1 Class | WWII SC-497 Class | |
|---|---|---|
| Length Overall | 110′ 0″ | 111′ 6-¾” |
| Extreme Beam | 14′ 8.75″ | 17′ 11.5″ |
| Displacement (Tons) | 85 | 98 |
| Engines | 3 standard 220 hp Gasoline, 3 screws | Two GM straight 8 Diesel (8-268-A) 1440 hp, or Two GM 16 cyl. 184-A “pancake” engines |
| Speed | 18 knots | 15.6 knots or 21 knots |
| Maximum Draft, full load | 5′ 8″ | 6′ 6″ |
| Armament | 1 3″/23 cannon 2 30 cal. Machine guns 1 DCP “Y” gun and depth charges | 1 Single 40 mm Bofors or 1 3″/50 cannon (forward) 3 Single 20 mm Oerlikon (midships) 1 Twin 50 cal. machine gun (optional) (aft) 2 K-guns 14 depth charges 300 lb each with 6 single release chocks 2 sets Mark 20 mousetrap rails, each mounted with 4 7.2″ projectiles |
| Complement | 2 officers, 25 enlisted | 3 officers, 24 enlisted |
| Endurance | 1,000 nautical miles @ 12 knots | 1,500 nautical miles @ 12 knots |
Facts:
- A total of 440 subchasers were built for World War I.
- A total of 438 subchasers were built for World War II.
- Prior to the Pearl Harbor attack 84 SC hulls had already been laid down.
- None of the current encyclopedias today have articles about subchasers.
- No SCs were numbered from 800 to 899.
- Twenty WWII subchasers (SC-449 class) built by Luders Marine Construction Co. of Stamford, CT were 110′ 10″ long rather than 111′ 6-¾”.
- Elizabeth City Shipyards, Elizabeth City, NC built more SCs than any other boatyard, a total of 28. The same builder set a record for the fastest time from keel-laying to launching when it built SC 740 in 30 days.
- Seventy SCs were converted to SC-C (Landing control vessels) but not one of the 19 SCs used at the Normandy landing was an SC-C.