Download coordinates as: Operation Julin[1] was a group of 7 nuclear tests conducted by the United States in 1991–1992.

Shot Diamond Fortune was to investigate blast flow field produced by a modern nuclear weapon.

The floor was divided into two sections, one covered in base soil and the other in snow simulant.

Further Hydroplus experiments were conducted in shot Distant Zenith of Operation Sculpin.

It had a planned yield of 20 to 150 kilotonnes of TNT (84 to 628 TJ) and was to be fired at 1,557 feet (475 m) below the surface in Area 9.

These experiments used line of sight (LOS) pipes to channel gamma, x-ray and neutron radiation from the device to them.