AN/GRC-242 UHF Radio Set Base Station

CSEL AN/GRC-242 UHF Radio Set Base Station.

Today in WW II: 8 Feb 1940 Germans establish the first large Jewish ghetto in Poland in the city of Lodz. More ↓

8 Feb 1941 US House of Representatives passes the Lend-Lease Act [265 to 165].
8 Feb 1942 Battle of Sarimbun Beach begins, the first stage of the Japanese assault on Singapore.
8 Feb 1942 Japanese Offensive in Burma begins [8 Feb-2 May].
8 Feb 1945 Battle of the Reichswald: British and Canadian forces under Field Marshal Bernard Montgomery begin Operation Veritable [8 Feb-11 Mar].
Visit the Olive-Drab.com World War II Timeline for day-by-day events 1939-1945! See also WW2 Books.

CSEL AN/GRC-242 UHF Radio Set Base Station

Satellite dishes at the Naval Computer and Telecommunications Area Master Station Pacific. CSEL AN/GRC-242 UHF Radio Set Base Stations are co-located at NCTAMS facilities.

The Combat Survival Evader Locator (CSEL) Over the Horizon (OTH) Segment consists of four UHF Base Stations (UBS), composed of AN/GRC-242 radio sets located to provide world-wide coverage of the CSEL system. The UBS is the hub of the CSEL over-the-horizon command and control architecture. The OTH Segment communicates over military UHF SATCOM system and the civilian Search & Rescue Satellite Assisted Tracking (Cospas-Sarsat) system.

The CSEL UBSs are co-located with Naval Computer and Telecommunications Area Master Station (NCTAMS) facilities (photo above).

The UHF SATCOM mode supports two-way secure data communications between a UBS and the Combat Survival Evader Locator (CSEL) AN/PRQ-7 Handheld Radio (HHR) over a dedicated 5 KHz channel. Messages are responded to by the Joint Search & Rescue Center (JSRC) or component RCC controller via a UBS secure UHF SATCOM data transmission.

AN/GRC-242 Radio Set Base Station Console

The UBS Console measures 84 inches high, 22.5 inches wide, and 30 inches deep (42 inches deep with the keyboard extended), and weighs 300 pounds (top photo). It requires a conventional 20 ampere electrical supply of 115 Volts Alternating Current at 60 Hertz (Hz). The power supply supports two independent sources of electrical current for high-availability operation.