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 =-=
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=
