 Type C6 ship SS Grand Canyon State as a converted auxiliary crane ship.
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| Class overview |
|---|
| Builders |
- Alabama Drydock and Shipbuilding, Mobile, Alabama (MA-8 and MA-10)
- Bethlehem Steel, Key Highway Yard, Baltimore, Maryland (MA-12 and MA-15)
- Ingalls Shipbuilding (West Yard), Pascagoula, Mississippi (MA164-166; MA-244 - MA-247)
- Norfolk Shipbuilding and Drydock, Norfolk, Virginia (MA-14)
- Todd Shipyards, Galveston, Texas (MA-9 and MA-13)
- Todd Shipyards, Brooklyn, New York (MA-30)
- Todd Shipyards, Seattle, Washington (MA-164 - MA-166)
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| Operators | United States Maritime Commission |
| Preceded by | Type C4 and C5 class ships |
| Succeeded by | Type C7 container ship |
| Subclasses | Four |
| Completed | 19 |
| Laid up | 3 (NDRF) |
| Scrapped | 16 |
| General characteristics |
|---|
| Type |
- C6-S-1qa partial container ship (3 converted from C4-S-1a)
- C6-S-1w container ship (8 converted from C4-S-1a)
- C6-S-85a container ship (4 new built)
- C6-S-85b container ship (3 new built)
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| Tonnage |
- 16,820 gross tons (C6-S-1qa)
- 15,830 gross tons C6-S-1w
- 21,150 gross tons C6-S-85a
- 21,500 gross tons C6-S-85b
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| Length |
- 668.65 ft (203.80 m) C6-S-1qc
- 661.17 ft (201.52 m) C6-S-1w
- 669.67 ft (204.12 m) C6-S-85a
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| Beam |
- 76 ft (23 m) C6-S-1qc
- 76 ft (23 m) C6-S-1w
- 90 ft (27 m) C6-S-85a
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| Draft |
- 33.08 ft (10.08 m) C6-S-1qc
- 27 ft (8.2 m) C6-S-1w
- 29 ft (8.8 m) C6-S-85a
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| Speed | 19.5 - 22.5 knots |
| Range |
- 13,700 miles (C6-S-1qc)
- 9,400 miles (C6-S-1w)
- 16,200 miles (C6-S-85a)
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| Complement | Varied by design type |
The Type C6 ship is a United States Maritime Administration (MARAD) designation for a container ship developed during the transition years from moving goods by breakbulk cargo to containerization. The Type C4 ships Mariner class, arranged with its house/engine-room in the center of the vessel with cargo hatches at 4 forward and 2 aft, was very successful. Eleven of these Mariner ships were converted into Type C6 container ships, and eight vessels were new built. As of September 2023 only three C6 ships, the converted C4s, are extant. All three are crane ships in the National Defense Reserve Fleet.
