Battery AMTB - Deception Pass

 (1942-1945) - Battery AMTB - Deception Pass was a World War II AMTB rapid fire 90mm gun battery at Deception Pass, Island County, Washington. Battery construction started in 1942 and was completed in 1942. Deactivated in 1945 at the end of the war. Also referred to as Battery AMTB 1A within the harbor defense.

World War II
The AMTB battery at Deception Pass consisted of two 90mm M1 guns mounted on 90mm M1A1 mobile gun mounts. Concrete pads were provided for the mobile guns. Two earth covered magazines provided protection for the ammunition. Electric power was provided by M-7 portable generators. The equipment and the guns for the battery were normally stored at Fort Casey and emplaced for alerts and practice. The battery reported directly to the HECP at Fort Worden.

The battery had a dual mission of defense against fast enemy motor torpedo boats and enemy aircraft. The effective range of the guns was about 8,000 yards or 4.5 miles. Each weapon required a crew of 15, 9 men in the gun squad and 6 men in the ammunition squad.

In addition to the two 90mm guns there were four positions for 50 Caliber AA Weapons and a position for portable Searchlight #1. The fire control equipment of this battery consisted of an M-9 Director and an M-2 Height Finder. Both instruments were to be emplaced in prepared positions and protected laterally from bomb and shell fragements by sand bag breastworks.

Current Status
No remains.

See Also:
 * Harbor Defense of Puget Sound
 * Fort Worden
 * Fort Casey

Sources:


 * Seacoast Artillery Ammunition Report of Harbor Defenses of Puget Sound For the period 1 July 1945 to 31 Dec 1945, NARA RG165, E257 Box 68 - Bolling Smith.

Links: 
 * North American Forts - Battery AMTB - Deception Pass]