The internal AHRS is pre-calibrated.
Deploying a transponder on the seabed and record Gaps M5 data during a circle and an "8-
shape" trajectory is a good way to check the system operational accuracy. Considering the
median transponder position is the reality, you will check the position dispersion and accu-
racy.
In shallow water, the Gaps M7 will be at least two time better than Gaps M5 in X/Y estima-
tion, and 5 times better on depth estimation due to its antenna geometry and higher-grade
hydrophones.
Gaps M5 can be interfaced to DP systems by delivering, through a serial or ethernet link,
transponder relative position (USBL) from one transponder deployed on the seabed and
vessel absolute position (LBL) when at least 3 transponders are deployed. Gaps M5 is an
effective acoustic part for dynamic positioning DP2 and DP3 in shallow water.
Gaps M5 embeds an AHRS Octans Nano. It automatically compensates the vessel move
for attitude and heading.
There is no established limitation of the sea state, the internal AHRS compensates the ves-
sel use. In case of strong wave condition, we adise to mount the Gaps a bit deeper to avoid
air buble issue.
Summary of Contents for Gaps M5
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