FORCETALLY
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At a glance
Rigid Raiderlarger figure on 0 of 1
Shippingport (ARDM-4)larger figure on 1 of 1
Counts only measures both sources give with the same scope. A larger figure is not a better system.
Measured figures
Length
Single source6.5 m (21 ft 4 in)[source]
Length
Single sourceConfiguration
| Specification | Rigid Raider | Shippingport (ARDM-4) |
|---|---|---|
| Displacement | — | 5400 tons[source] |
| Troops | 10 Royal Marines (2 crew, 8 fully equipped troops)[source] | — |
| Role | fast raiding and assault craft[source]Exact source equipment subject, not its payload or a supported platform | Medium Auxiliary Repair Dry Dock[source]Exact source equipment subject, not its payload or a supported platform |
| Country of origin | United Kingdom[source]Inventory Origin column; table 2, row 3, cell 2; revision 1373375989; retrieved 2026-09-30 | — |
492 ft 0 in (149.96 m)[source]
In excess of
Single sourceIn excess of 120 nautical miles (220 km)[source]
6-cylinder turbo-diesel
Single source6-cylinder turbo-diesel , 240 hp (180 kW)[source]
Bars compare reported quantities only. A larger figure does not make a system better; configurations and test conditions differ.
| Name | — | Shippingport (ARDM-4)[source] |
|---|
| Namesake | — | Shippingport, Pennsylvania[source] |
|---|
| Builder | — | Bethlehem Steel , Shipyard, Sparrows Point, Maryland[source] |
|---|
| Laid down | — | 5 April 1977[source] |
|---|
| Launched | — | 2 September 1977[source] |
|---|
| In service | — | 4 January 1979[source] |
|---|
| Refit | — | completed September 2012[source] |
|---|
| Status | — | active, Naval Submarine Support Facility, New London, Connecticut[source] |
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| Class & type | — | ARDM-4 -class[source] |
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| Propulsion | — | None[source] |
|---|