DETAILED NOTES ON UNDERWATER NUCLEAR TEST 'UMBRELLA' (1958)

With test moratoriums within the horizon, American weapons labs rushed out a lot of new designs. A tough deadline for testing was established at midnight (0000 hrs), 31 Oct 1958, as negotiations were being established to get started on that working day, as well as the plan demonstrates it, with 29 tests executed in Oct, 4 of these on the final work