REMARKS ON USAGE
v
Conditions affecting accuracy
(with ref to IMO A.824/3.3)
The Doppler speed log DS-85 is designed for reliable and accurate performance through FURU-
NO's long experience and advanced technology. It operates on the best choice of system frequen-
cy and power output. As far as the sonic energy is used, the performance (accuracy) may be
reduced or even lost in the following conditions:
Take care to the transducer location
The transducer may be damaged if it hits the dry dock blocks. Take the following measures to pre-
vent damage to the transducer when the ship is put in drydock.
1. Before delivering the ship, draw up a suitable docking plan taking into account the
dimensions
a
nd location of the transducer. Store the plans aboard the ship.
2. Place the dry dock blocks according to the plan.
3. Have a diver check the position between the transducer and the blocks before removing
the
water. Conf
irm that the transducer will not touch the blocks.
• rough weather (may be sea state 6 or higher severity).
• improper location of sensor; for example, too close to the propeller, thrusters, drain tubes or echo
sounder’s transducer.
• depth under the keel if less than 3 m.
• Pitch and roll is ±10% or more.
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