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34
<Background knowledge>
In general yacht racing, such markings as
shown in the figure are set in the course.
Yachtsmen compete in how fast they can sail
the course in the specified order. Sailing
directions are specified by angles such as
north = 0°, east = 90°, south = 180°, west =
270°.
Sailing with the wind coming from the right
side is called starboard, sailing with wind from
the left side is called port.
STARBOAR
D
REACH
PO
RT
REAC
H
RUNNING
WINDWARD LEG
2. Yachting function
Wind
Windward mark
Start line
Leeward mark
Side mark
<Using bezel-1>
(1) Before setting sail, find the windward mark by the compass and set the “
\
”
mark of the 12-hours point in the direction.
(2) The course toward the side mark from the windward mark (starboard reach)
is in the direction of the green “
\
” mark located in the lower left side.
Therefore, sail in this direction so that the yacht reaches the side mark even
when the mark is hard to find because of bad weather.
(3) In the same manner as (2), sail in the direction indicated by the red “
\
” mark
in order to sail on the course from the side marking to the leeward mark (port
reach).
(4) For sailing from the right side marking to the left, sail the yacht in the
direction of the white “
\
” mark.
Note: The above-mentioned method is effective only when
θ
is set at 45°. If the
θ
is 60° and the side mark projects sidewards, read the numbers above
the green and red markings, otherwise the right course cannot be found.
In case
θ
is 30° and the side mark is inside, read the numbers under the
red and green
\
markings.