NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Silicon Sea Information
From: Dan Hogan
Date: 1998 May 18, 5:08 AM
From: Dan Hogan
Date: 1998 May 18, 5:08 AM
READ WITH FIXED PITCH FONT 7.5" x 11" .5' margins page setting. ***************Cut Here************************* BEAUFORT SCALE OF WIND FORCE ---------------------------------------------------------------------- ------- No. Speed Description Height of Sea Deep Sea Criteria Knots* Meters Feet** ---------------------------------------------------------------------- ------- 0 less Calm _ Sea mirror smooth than 1 1 1-3 Light air 0.08 1/4 Small wavelet like scales, no crests. 2 4-6 Light Breeze 0.15 1/2 Small wavelets still short but more pronounced. Crests glassy and do not break. Foam is glassy. 3 7-10 Gentle breeze 0.6 2 Large wavelets crests begin to break. Foam is glassy. 4 11-16 Moderate breeze 1.0 3 1/2 Small waves becoming longer; more frequent white horses. 5 17-21 Fresh Breeze 1.8 6 Moderate waves, and longer; many white horses. 6 22-27 Strong Breeze 2.9 9 1/2 Large waves begin to form; white crests more extensive. 7 28-33 Near Gale 4.1 13 1/2 Sea heaps up; white foam blown in streaks. 8 34-40 Gale 5.5 18 Moderately high waves of greater length; crests begin to form spindrift. Foam blown in well marked streaks. 9 41-47 Strong Gale 7.0 23 High waves dense streaks of foam. Crests begin to roll over. 10 48-55 Storm 8.8 29 Very high waves with long overhanging crests. Surface of the sea becomes white with great patches of foam. visibility affected. 11 56-63 Violent Storm 11.3 37 Exceptionally high waves. Sea completely covered with foam. 64+ Hurricane The air is filled with spray and visibility seriously affected. _____________________________ * Measured at height of 10 meters (33 feet) above sea level. ** In the open sea remote from land. *****************Cut Here*************************** Silicon Sea Glossary True Course(TC)-- The direction to travel, from a point of departure to a destination/waypoint, plotted on a chart in relation to true north ( of course meridians of longitude run north). Magnetic Course(MC)-- The true course corrected for variation. Compass Course(CC)-- The magnetic course corrected for deviation. Compass Course Made Good(CCmg)-- The compass heading with corrections for variation, deviation and current have been applied. Same as: COURSE TO STEER/COURSE STEERED, etc. Or whatever term your calculator/program uses for the course steered by the compass to a destination. Compass Bearing-- A bearing taken with the ships compass. Handbearing-- A bearing taken with a handheld compass. Speed(S)-- The speed of the boat through the water. Knotmeter reading, etc. Speed Made Good(SMG)-- Speed corrected for the effect of current. Set-- The direction to which the current is flowing. Drift-- The speed of the current in Knots. mi-- Nautical mile(s). Ded Reckoning Position(DR)-- The position as calculated by the formula Distance = Speed x Time or other DR method. Rumb-Line, Mercator Sailing, or Mid-Latitude. Estimated Position(EP)-- The DR corrected for the effect of current. ****************Cut Here****************** Dan Hogan WA6PBY "Gacha" Catalina 27 San Pedro, CA dhhogan@concentric.net =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-= =-= TO UNSUBSCRIBE, send this message to majordomo@ronin.com: =-= =-= navigation =-= =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=