Specifications | |
| Displacement | Light Displacement: 10205 tons Full Displacement: 16680 tons Dead Weight: 6475 tons |
| Length | Overall Length: 523 ft Waterline Length: 498 ft |
| Beam | Extreme Beam: 72 ft Waterline Beam: 72 ft |
| Draft | Maximum Navigational Draft: 26 ft Draft Limit: 26 ft |
| Speed | 18 knots |
| Power Plant | One diesel, 11,520 brake horsepower |
| Aircraft | Two UH -46 Sea Knight helicopters |
| Armament | None |
| Complement | 123 civilian, 47 Navy |
| Builder | Swan Hunter & Wigham Richardson Ltd., Wallsend-On-Tyne |
Ships | ||||||
| Name | Number | Builder | Homeport | Ordered | Commissioned | Decommissioned |
| Sirius | T-AFS 8 | Swan | Norfolk | 04 Apr 1965 | 18 Jan 1981 | |
| Spica | T-AFS 9 | Swan | 01 Apr 1965 | 22 Nov 1981 | ||
| Saturn | T-AFS 10 | Swan | Norfolk | 01 Oct 1965 | 01 Dec 1983 | |