Drill and code book of United States Power Squadrons (1916)
United States Power Squadrons. [from old catalog] · [Boston?] · leaf 13
n. X—X-Ray Signals Apply to Port Column only. Signals given on port spreader while X remainsdisplayed will apply to the Port Column only.X is displayed only when in double columnformation, and it is understood that the PortColumn remains the Port Column during this maneuver, regardless of its… … Come within Hail. Signal is Annulled. To be hoisted by Flagboat when desiring toannnl all signals at that moment displayed. Whenhoisted alone, it annuls the last signal. MEMORANDA 10
Signals and signaling · Yachts and yachting
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