| Specifications |
| HSV-X1 | WestPac Express | TLV 101 | TLV 125 |
| Overall length | 313'3" / 96.3 m | 101.0 meters | 101 meters | 125 meters |
| Immersed Hull | | 88.7 meters |
| Moulded Beam | 87'4" | 26.65 meters |
| Hull Draft | 13'0" (4 meters) (Full Load) | 4.2 meters |
| Displacement Tonnage | 1,740 tonnes (1,918 STON)(Full Load) | | |
| Deadweight | 741 tonnes (815 STON) | |
| Propulsion |
| Engines | | 4 x Caterpillar 3618 (each rated at 7200kW) | Gas turbine or diesel engine options |
| Gearboxes | | 4 x Reintjes VLJ6831 |
| Waterjets | | 4 x Kamewa 125 SII |
| Speed | Loaded - 38 knots; Light - 48 knots max | 37 knots | 35 - 45 knots |
| Range | 2,400 nautical miles with 25% fuel reserve | | | |
| Passengers | 360 (troops and crew) | 950 - 1200 | 951 | 1700 |
| Trucks | | 16 | 4 | 4 |
| Hummers | | | 100 | 114 |
| Helicopters | | | 12 | 14 |
