Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    Silicon Sea: Beaufort Wind Scale
    From: Dan Hogan
    Date: 2002 Oct 15, 09:32 -0700

    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 wavelett like
                                                         scales, no crests.
    2    4-6        Light Breeze     0.15    1/2         Small wavelets still
                                                         short but more
                                                         pronounced Crests
                                                         glassey and do not
    3    7-10       Gentle Breeze    0.6     2           Large waveletts crests
                                                         break.Foam is glassy.
                                                         Crests begin to break.
                                                         Foam is glassey.
    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
    6    22-27      Strong Breeze    2.9     9 1/2       Large waves begin to
                                                         form; white crests more
    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.
    Dan Hogan WA6PBY
    C27 "Gacha"
    Nav-L Page: http://www.wa6pby.com

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.

    Email Settings

    Posting Code:

    Custom Index

    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site