Two-unit gyro pilot was introduced to marine field to meet demand which exists for automatic steering apparatus that is entirely independent of telemotor system; visible air whistle was designed to meet requirements of motor vessels fitted with compressed-air whistles.
Sperry two-unit gyro pilot and visible air whistle
Mar. Eng. Shipg. Age
Marine Engineering and Shipping Age ; 30 , n 12
1925
2 Figs.
Article (Journal)
English
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