UK - Operation Grapple
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Explosions
9
Total yield
8.1 MT
First shot
1957-05-15
Last shot
1958-09-23
| Operation | Name | Date | Location | Yield |
| Grapple | Short Granite | 1957-05-15 | Malden Island | 300 kT |
| Grapple | Orange Herald | 1957-05-31 | Malden Island | 720 kT |
| Grapple | Purple Granite | 1957-06-19 | Malden Island | 200 kT |
| Grapple | X Round C | 1957-11-08 | Kiribati (Christmas Island) | 2.0 MT |
| Grapple | Y | 1958-04-28 | Kiribati (Christmas Island) | 3.0 MT |
| Grapple | Pennant 2 | 1958-08-22 | Kiribati (Christmas Island) | 24 kT |
| Grapple | Flagpole 1 | 1958-09-02 | Kiribati (Christmas Island) | 1.0 MT |
| Grapple | Halliard 1 | 1958-09-11 | Kiribati (Christmas Island) | 800 kT |
| Grapple | Burgee 2 | 1958-09-23 | Kiribati (Christmas Island) | 25 kT |