Download coordinates as: Operation Wigwam[1] involved a single test of the Mark 90 "Betty" nuclear bomb.

It was conducted between Operation Teapot and Project 56 on May 14, 1955, about 500 miles (800 km) southwest of San Diego, California.

A six-mile (ten-kilometer) tow line connected the 205-foot (62 m) Cherokee-class fleet tug, USS Tawasa, to the shot barge.

Suspended from the tow lines of other tugs were three miniature unmanned target submarines designated "SQUAWS", each packed with cameras and telemetry instruments.

As the sound traveled away from the test point, it reflected from topographic features, such as islands and seamounts, located throughout both the North and South Pacific Basins.