Casio WSD-F10 User Manual page 68

Interpreting Fishing Time Screen Contents
Fish Marks (Projected Probability of Fishing Success
Indicators)
The number of fish marks on the Fishing Time screen indicates the projected
probability of fishing success. Anywhere from zero to four fish marks are
displayed, and more fish marks indicate that better success can be expected.
Note however, that this in no way specifically guarantees your fishing
success.
The fish mark indicator display is based on the current Moon age and Moon
position (time angle). Fishing timing is said to be best when the Moon age is
new Moon or full Moon, and second best during the Moon's first quarter and
last quarter. For the Moon time angle, 00:00 and 12:00 is said to be optimal,
while 06:00 and 18:00 is said to be second best. The correlation of these
factors results in the fish mark indications shown below.
New Moon/ Full
Moon
*
First Quarter/
Last Quarter
Other
* Including Moon ages 26.9 to 28.6, and 12.1 to 13.8.
Note
Hour angle is one of the coordinates used to give the direction of a celestial
●
body (planet, moon, etc.) point on the celestial sphere. The hour angle
directly overhead is 00:00, westward is 06:00, directly downwards is 12:00,
and eastward is 18:00.
Hour Angle
00:00/12:00 Hour
EN-66
Hour Angle
06:00/18:00 Hour
Other