thumb|250px|Video of the test—12 second intro

Operation Wigwam The task force commander, Admiral John Sylvester, was embarked on the task force flagship . Wigwam was the first atomic test in the deep ocean, and it remains the only test that has been conducted in water deeper than .

Detonation layout and test

left|thumb|Wigwam test, 1955

The test device was suspended to a depth of by cable attached to a barge. A tow line connected the Cherokee-class fleet tug, , 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. Those targets were long, scale of the SS-563 prototype hull () to assess effects of the explosion on a submarine hull.

See also the table at List of United States' nuclear weapons tests.

Underwater sound

The underwater sound from the Wigwam explosion was recorded on bottom-mounted hydrophones at Point Sur and Point Arena off California, and at Kāneʻohe Bay off Oahu, Hawaii.

!style="background:#efefef;" | Date time (UT)

!style="background:#ffdead;" | Local time zone

!style="background:#efefef;" | Location

!style="background:#ffdead;" | Elevation + height

!style="background:#efefef;" | Delivery,<br />Purpose

!style="background:#efefef;" | Device

!style="background:#ffdead;" | Yield

!style="background:#efefef;" class="unsortable" | Fallout

!style="background:#ffdead;" class="unsortable" | References

!style="background:#efefef;" class="unsortable" | Notes

|-

! Wigwam

| 20:00:00.0

| style="text-align:center;" | PST (−8&nbsp;hrs)<br />|| Pacific Ocean off California

| 0–

| underwater,<br />weapon effect

| Mk-90 B7 "Betty" depth bomb

| style="text-align:center;" |

|

|

  • [https://web.archive.org/web/20140626034642/https://www.ctbto.org/specials/testing-times/14-may-1955-wigwam/]—A description of the WIGWAM test and its radiation aftereffects at the Comprehensive Nuclear-Test-Ban Treaty Organization Preparatory Commission Web site (archived)