Abstract: An aviation weather information dissemination system and method involves regional weather-information accumulating and interpreting stations (12A-O) located throughout a geographic area (10). Each regional weather-information and interpreting station communicates with sources (16, 20 and 24) of current weather information peculiar to widely scattered geographic locations, within the geographic area (10). The system also includes a plurality of terminals which communicate with the regional weather-information accumulating and interpreting stations (12) via telephone lines, with each regional station serving particular terminals (14). The regional stations (12), in response to receiving origin and destination points of flights from said terminals (14), compute tentative flight paths between said origin and destination points and provide weather information to the terminals (14) in particular sequences relative to the origins and destinations.

Abstract: A fixed wing is provided and includes an upwardly opening recess formed therein and extending along the trailing marginal edge portions of the wing. A flap is provided and mounted from the wing for shifting relative thereto between a first lower retracted limit position at least substantially fully received in the recess, and an elevated position displaced upwardly above the upper surface of the wing with the flap disposed at an angle of attack greater than the angle of attack of the wing.

Abstract: A boat hull including a center depending keel fin is provided and the keel fin includes an upstanding rear edge portion having a horizontally rearwardly opening transverse recess formed therein. An upstanding main fin extending generally longitudinally of the hull is oscillatably supported in the forward portion of the keel fin recess for angular displacement about an upstanding axis spaced forward of the horizontal longitudinal center of the main fin and an upstanding front-to-rear extending servo fin is oscillatably supported from the rear portion of the main fin for angular displacement relative thereto about an upstanding axis. The interior of the hull includes heel sensing drive structure operatively connected between the hull and the servo fin for displacing the latter to starboard relative to the main fin in response to starboard heeling of the hull and displacing the servo fin to port relative to the main fin in response to heeling of the hull to port.