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| Nationality | Great Britain |
| Nominal Guns | 4 |
| Approved | 1837/11/03 |
| Designer | Sir William Symonds |
| Rate | Unrated |
| Type | Steam Sloop |
| Designed Crew | 135 |
| Ships in Class | 3 |
| Design Armament | Broadside Weight = 32.00 Imperial Pound ( 14.51 kg) | B181 | |
|---|---|---|---|
| Gun Deck | 2 x British 32-Pounder | ||
| Pivot Mount | 2 x British 8inch | ||
| Design Dimensions and Ship Information | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Ordered | Shipyard | Launched | Out of service | Fate | Gundeck Length | Length of Keel | Breadth | Depth in hold | Burthen | |
| As Designed | 165' 0" | 143' 7 ¼" | 32' 10" | 20' 4" | 814 91⁄94 | |||||
| Hecate (4) | 12.3.1838 | Chatham Dockyard - Chatham | 30.3.1838 | 1865 | Sold for Break Up | 165' 0" | 143' 7 ¼" | 32' 10" | 20' 4" | 814 91⁄94 |
| Hydra (4) | 18.9.1837 | Chatham Dockyard - Chatham | 7.1838 | 13.5.1870 | Sold for Break Up | 165' 0" | 143' 7 ¼" | 32' 10" | 20' 4" | 814 91⁄94 |
| Hecla (4) | 15.3.1838 | Chatham Dockyard - Chatham | 14.1.1839 | 15.6.1863 | Sold | 165' 0" | 143' 7 ¼" | 32' 10" | 20' 4" | 814 91⁄94 |