ページを印刷するCompass and its control
ODA is equipped with a built-in compass in the body of the device . Thus, the diver directly
determines the direction in which he is looking .
The compass constantly evaluates its own accuracy, this tells the diver the compass reliability
at any given moment .
if the compass accuracy is low, an exclamation mark will appear at the bottom left of the
screen with a text warning about the low compass accuracy
Compass accuracy is determined by the following factors:
•
Compass calibration
•
The presence of strong magnetic fields within range of the compass
•
ODA position relative to the diver's eye
Compass calibration
There is no need to run any special mode in the rebreather head to calibrate the compass,
as the compass adjusts continuously . However, it must be ensured that no magnetic field is
present during calibration, which can be caused by metal or electronic objects . Also make sure
that the ODA is as far away from the Liberty's head and handset as possible during calibration .
1 . Place the ODA on the left side, leave for 2–5 sec
2 . Place the ODA on the back, leave for 2–5 sec
3 . Place the ODA on the right side, leave for 2–5 sec
4 . Turn ODA several times in the air in the direction of imaginary eights
Presence of strong magnetic fields
The compass can be greatly affected by the magnetic field of surrounding objects such as
wrecks, diving tanks, the high content of iron ore in the rock of the mine's gallery and other
metal, magnetic or electronic objects . The accuracy of the compass may be temporarily
affected to a greater or lesser extent within the range of magnetic fields .
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