B&G Hydra 2000, Руководство пользователя

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Hydra 2000 User Manual
Part 2 - Operating Information
HB-0844-02
2- 35
NAVIGATE
→
TIDE SET, CALBRATE
→ →
CAL VAL 1 (MAG
VAR)
Note
If your position fixer sends magnetic bearing, check that the
variation is correctly entered into it.
The calculation involves comparing the course and speed over
the ground, from the position fixer, to the course and speed of the
boat through the water, from dead reckoning. Any differences are
due to the tidal set and drift and can be displayed as such. To
make this accurate the dead reckoning really requires Leeway
input and this in turn requires a heel angle sensor to measure heel
angle.
The damping on this function is adjustable and this can be
important. In rapidly changing tidal situations you need to lower the
damping right down to be able to see changes quickly.
Conversely in a steady tide or current the longer time the
calculation is averaged over, the more accurate the results will be.
The lag in the position fixer’s ability to adjust to rapid changes in
direction, such as tacks, should also be considered when using
the results of this function. When making numerous tacks,
readings should be treated with caution.
2.11.33 Timer
Menu Heading: TIME
Function Text: TIMER
Update Rate: Once per second
Units: Hours, minutes and seconds
Note
Individually resettable.
Used to time the start and to record elapsed time during a
handicap race. The timer will act as either a stopwatch or
countdown from 5, 10 or 15 minutes.
Pressing the Enter Key will toggle the display between min/secs
and hrs/mins as indicated on the display.