In 1942 five batteries of AMTB guns protected the San Pedro Harbor. There were four batteries of 90-mm guns and 37-mm guns and one of only 37-mm guns. These were fast-firing weapons, which were supplemented with 50-caliber machine guns and searchlights as needed.

In the fall of 1942, the Army decided to install 90-mm anti-motor torpedo boat (AMTB) batteries in the harbor defenses. Each battery consisted of two fixed and two mobile guns. The mobile guns were kept in storage until an emergency occurred.

Four Anti Motor Torpedo Boat (AMTB) batteries were built for the Harbor Defense of Los Angeles during World War II under Job No. FS-8 at a total cost of $76,576.03. All four batteries were constructed between June 1943 and October 1943 and …

The AMTB battery at Baker Beach consisted of two 90mm gun mounted on 90mm M3 gun mounts and two 90mm guns on mobile M1A1 carriages. Concrete pads for both these guns were laid at Baker Beach directly in front of the MCII and MCIII Combined Mine Casemate.

These guns were termed AMTB equipment, and typically emplaced near the entrance of harbours in two or one gun configuration. The Pulau Ubin AMTB battery formed part of the Changi Fire Command – a network of coast artillery batteries placed to protect the eastern part of Singapore; specifically, the waterway leading into the Royal Navy base at ...

Battery AMTB 23 - Parrott (1943-1946) - Battery AMTB 23 Parrott was a World War II rapid fire AMTB 90mm gun battery built into Battery Parrott on Fort Monroe, Virginia. Battery construction started on 1 Jun 1943, was completed on 8 Aug 1943 and transferred to the Coast Artillery for use 1 Nov 1943 at a cost of $ 17,289.00.

Each observation level in a station was used exclusively for one specific gun battery or command post, usually manned by six observers per level, and three observers for each AAIS post.

2023年3月22日 · AMTB 969 / 2-90 mm / F / 1943-1946 / Great Chebeague Island, buried AMTB 970 / 2-90 mm / F / 1943-1946 / Bailey Island, one gun block covered FORT LYON /Cow Island /1896 /private /KK

New 90 mm guns were added to the program as anti-motor torpedo boat (AMTB) batteries. By that year permanent defenses were planned for Alaskan, Hawaiian, Panama, Caribbean, and Newfoundland harbor areas. However, the possibility of a Japanese attack on the American mainland diminished, and the need for offensive weapons and manpower increased.

In 1942 five batteries of AMTB guns protected the San Pedro Harbor. There were four batteries of 90-mm guns and 37-mm guns and one of only 37-mm guns. These were fast-firing weapons, which were supplemented with 50-caliber machine guns and searchlights as needed.