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CCS
DP-0, DP-1, DP-2
RMRS
DYNPOS-0, DYNPOS-1, DYNPOS-2
Table 1: IMO DP Notations
Main advantages of the AlphaDynaPos DP Dynamic Positioning system:
1. Accurate positioning with up to 0.5 meter accuracy in combination with accurate DGPS and MRU (inclinometer),
which is used as a position reference.
The DGPS and Motion Reference Unit allows for accurate filtering and calculating of the actual position with the
DGPS signal and taking into account the actual movement of the vessel. Higher position accuracy can be achieved
with for example, a laser beam system.
2. Sea trial tuning and testing can be limited to three days maximum.
Parameter tuning is already done before dispatch from our factory by modeling of the ship and testing with a ship
simulator. In addition, during the sea trial our self-tuning DP algorithms greatly reduce the time needed on board.
3. Extremely reliable hardware by using only solid state components and 24VDC power supply.
The DP Workstation uses solid state disks running under the Windows-XP embedded operating system. The DP
Workstation (Marine PC, TFT screen and Printer) and all other components of the DP system are working with a
24VDC supply voltage with low power consumption.
4. Cost effective DP solution.
Reliable hardware that is field proven on hundreds of vessels, that allows for efficient and standard manufacturing in
large quantities. Therefore the advanced AlphaDynaPos Dynamic Positioning system, including navigation sensor
package, can be offered at a very attractive price.
I.3 Glossary
The Glossary lists an overview of Units of measurements and a table of abbreviations and explanation of terms used in
this manual.
I.3.1 Units
The AlphaDynaPos DP system works with the following units:
Unit
Distance
Speed
Heading / Bearing
Thruster direction
Rotation speed
7 | Preface
Description
Meters
Knots: 1 knot is approximately 0.5 m/sec
1 Knot is 1 nautical mile per hour, 1 nautical mile = 1852
meter.
More precisely: 1 knot x 1852 / 3600 = 0.514 m/s
Angle in degrees from 0 to 360°. 0° is towards North, 180°
is towards South.
Angle in degrees from -180 to +180° relative to vessel. 0°
is towards Bow, -180 and 180° is towards stern.
°/min.
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