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Patrol & mine warfare vessels2003–present
Offshore patrol vessel
River-class patrol vessel is a offshore patrol vessel. It was built by Batch 1: Vosper Thornycroft Batch 2: BAE Systems Maritime – Naval Ships. Reported operators include Royal Navy Brazilian Navy Royal Thai Navy Royal Bahrain Naval Force.
United KingdomRiver class
Batch 1: Vosper Thornycroft Batch 2: BAE Systems Maritime – Naval Ships
Royal Navy Brazilian Navy Royal Thai Navy Royal Bahrain Naval Force
Castle class
Krabi -class patrol vessel Amazonas -class corvette
2001–present
2003–present
14
14
8 (Royal Navy) 3 (Brazilian Navy) 2 (Royal Thai Navy) 1 (Royal Bahrain Naval Force)
Offshore patrol vessel
Batch 1: 1,700 t (1,700 long tons) Batch 2: 2,000 t (2,000 long tons)
Batch 1: 79.5 m (260 ft 10 in) Batch 2: 90.5 m (296 ft 11 in)
Batch 1: 13.5 m (44 ft 3 in) Batch 2: 13.5 m (44 ft 3 in)
Batch 1: 3.8 m (12 ft 6 in)
Batch 1: 2 × Ruston 12R270 diesel engines, 8,250 kW (11,060 hp ), 2 shafts 2 × controllable-pitch propellers Batch 2: 2 × MAN 16V28/33D diesel engines, 14,700 kW (19,700 hp), 2 shafts 2 × controllable-pitch propellers
Batch 1: 20 knots (37 km/h; 23 mph) Batch 2: 25 knots (46 km/h; 29 mph)
Batch 1 & 2: 5,500 nmi (10,200 km; 6,300 mi)
Batch 1: 21 days Batch 2: 35 days
Two Pacific 24 RIBs; Batch 2: Small Unmanned underwater vehicles may be embarked for mine countermeasures
Batch 1: c. 18 Batch 2: up to 50
Batch 1: 28-30 Batch 2: 34-50
Batch 2: Kelvin Hughes Ltd SharpEye navigation radar Terma Scanter 4100 2D radar BAE CMS-1 Shared Infrastructure operating system
Batch 1: 1 × Oerlikon 20 mm cannon 2 × General purpose machine guns Batch 2: 1 × Bushmaster 30 mm cannon 2 × Miniguns (replaced by Browning .50 caliber heavy machine guns as of 2023) 2 × general purpose machine guns
Batch 2: Merlin -capable flight deck; small UAVs may be embarked
Batch 1: 25-tonne crane Batch 2: 16-tonne crane
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Reference text from Wikipedia contributors, used under CC BY-SA 4.0.
True scale
Sourced dimensions beside a 1.75 m human reference.
Points represent sourced observations, including revisions. Revisions on the same effective date are not separate inventory events. Ranges appear in the table and are not plotted as exact points.
| Observation / report period | Value | Source | Claim state |
|---|---|---|---|
| 28 Sept 2026 | 79.5 m | Wikipedia contributors | superseded |
| 28 Sept 2026 | 79.5 m | Wikipedia contributors | superseded |
| 28 Sept 2026 | 79.5 m | Wikipedia contributors | approved |
River-class patrol vessel equipment records. Variants, orders and quantities are shown as reported in each inventory source; coverage is incomplete.
Royal Navy Brazilian Navy Royal Thai Navy Royal Bahrain Naval Force
Equipment reference ↗