List of World War II British Naval Radar - Nomenclature

Nomenclature

These sets were initially numbered as wireless telegraph (w/t) sets, but a distinguishing prefix of "2" was soon added. Metric sets were numbered in the 28x and 29x series. When centimetric sets arrived with the advent of the cavity magnetron, they were numbered by subtracting 10 from the metric type number they were based on (e.g. the metric Type 284 was replaced by the centimetric Type 274). This was not always possible however, as Types 271 - 274 were already in use for original centimetric sets, thus some metric sets in the Type 28x range had 20 subtracted (e.g. the metric Type 282 was replaced by the centimetric Type 262). Aerial outfits were given a three letter identifier that began with "A".

Suffixing letters indicated the following;

• B - conversion of sets with separate transmitting (Tx) and receiving (Rx) antennas to single antenna operation.
• M, P, Q - major set modifications
• R - addition of range-taking panel
• U - modification to suit coastal operations
• W - modification to submarine use
• X, Y, Z - experimental modifications