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The SINCGARS baseline radio provided non-secure ECCM FH and SC FM voice and data capability over the 30- to 87.975-MHz band. The RT-1439 provided an interface for an external COMSEC device for secure operations. It could be deployed in a manpack configuration, and in conjunction with other equipment in a vehicular configuration. RT-1439: RT ...
US Army Special Forces first existed within the Office of Strategic Services (OSS) Operational Groups. Army Green Beret Combat Divers were first in the OSS Maritime Unit. [3] The Lambertsen Amphibious Respiratory Unit (LARU) was the first closed-circuit re-breather adopted by the US Military and used in Combat Operations with the OSS MU.
Army divers use both surface-supplied equipment and scuba to perform their missions. [citation needed] The Special Forces (Green Berets) maintain a robust combat diving capability. One Operational Detachment-Alpha (ODA) per Special Forces Company is trained and equipped to conduct open and closed circuit sub-surface maritime infiltration ...
A diving watch, also commonly referred to as a diver's or dive watch, is a watch designed for underwater diving that features, as a minimum, a water resistance greater than 1.1 MPa (11 atm), the equivalent of 100 m (330 ft). The typical diver's watch will have a water resistance of around 200 to 300 m (660 to 980 ft), though modern technology ...
Military watches are believed to have received their name from a German military request for a soldier in a watch house, otherwise known as a guard tower. One story tells that the military wristwatches came into use when a German naval officer needed to know the time but could not pull out a pocket watch since both his hands were busy operating the machine.
Military divers are essential to many missions and campaigns. Combat and demolition work, underwater and coastal reconnaissance, ordnance disposal, search and rescue, salvage operations, construction, ship maintenance and underwater engineering. Every branch of the U.S. military employs divers, and more than 40 nations have military diving units.