What were the size and characteristics of the Swordfish's surface-search radar?
Short answerASV Mark II operated around 176 MHz with a broad beam and roughly one-to-forty-mile range, though the precise installation weight and wavelength are treated cautiously.
NotesASV Mark II operated at 176 MHz with a broad beam and an approximate range of one to forty miles. Combined with visual aids such as the Leigh Light, the family of ASV sets helped aircraft find submarines at night and in poor visibility. Roughly 24,600 sets were built, making this a widely fielded capability rather than a rare experiment. The wavelength figure is recalled only tentatively, so it should not be treated as settled.