Archive for date: January 4th, 2020

If the ship’s performance has to be simulated under all conditions it is necessary to find a method for...

More than 20 parameters are logged through the ship’s automation system. The timestamp for the logging has to be...

When measuring and analysing the data it is desirable that the data has statistical properties that are invariant over...

The data is sampled at an interval given by the software system. According to the Nyquist sampling theorem, Jerri...

Logged parameters Data acquisition sampling rate stationarity Data transformation Data evaluation Pre-processing spikes drop-outs Analysis Statistics Dissemination

Loading conditions Draught – trim Loading – wind area Position of point of gravity Operational conditions Heading Speed through...

The logged data from the sensors on board the ship is picked up by software designed for the purpose....

Draught information is given as manual input. At departure from port the draught forward and aft is taken from...

The sea water temperature is measured at the sea chest suction on the starboard side. The water temperature at...

The bow motions are measured by an accelerometer which is of the low-frequency type and placed in the bow...

The gyrocompass measures the ship’s heading with reference to true north. The heading is used to calculate true wind...

The air temperature is measured by a thermometer and the air pressure is measured by a barometer, both placed...

The GPS gives information about the speed of the ship. The speed is measured above ground whereas the speed...

The wind anemometer is a helicoid propeller type with a vane for direction measurement. The wind anemometer is mounted...

The stabiliser fins counteract the roll movements of the ship when sailing. The stabiliser fins are fitted on both...

The rudder indicator measures the rudder angle continuously and the measuring accuracy in the range of +/- 0.5° at...

If thrust were to be measured by strain gauges the thrust measurements would be in the order of 35...

The shaft motor is an electric motor delivering power to the shaft. The shaft motor is supplied with electrical...