The heave sensor records the vertical motion of the vessel. It is usually part of the MRU so it appears under the MRU component in the Vessels window.
The Heave component has the following attributes in the Attributes window:
• Date: The year and Julian day of the heave sensor time stamp (see Component Time Stamps).
• Time: The hour and minute of the heave sensor time stamp (see Component Time Stamps).
• Time Correction: The time correction value.
• Error: The error in the heave values recorded by the heave sensor, measured in metres.
HIPS and SIPS calculates the applied instantaneous heave values by subtracting this error from the recorded heave sensor values: Applied Heave = Recorded Heave - Heave Error
• X, Y, and Z: The distance from the reference position to the heave sensor.
Only define the XYZ location of the heave sensor when you intend to apply heave data during Georeference Bathymetry and remote heave compensation is necessary.
• X: The athwart-ship distance of the sensor, positive to starboard.
• Y: The along-ship distance of the sensor, positive to the bow.
• Z: The vertical distance of the sensor, positive into the water.
• Apply: Select Yes to apply heave data in the Georeference Bathymetry process.
• Manufacturer: The maker of the sensor equipment.
• Model: The particular make of sensor equipment.
• Serial Number: The serial number of the sensor equipment.
• Comments: A text field for your use.
The location of the heave sensor is shown in the Vessel Editor by a coloured dot.
If the data is from a Kongsberg system and the vessel’s HIPS SVC Enabled property is False (see Vessel), then you must set Apply for Heave, Pitch, and Roll to No. This is necessary because Kongsberg systems apply dynamic heave, pitch, and roll values to the swath data during the data acquisition. If HIPS SVC Enabled is set to False for the vessel and Apply is set to Yes for Heave, Pitch, or Roll, then HIPS will apply both the Kongsberg and the HIPS corrections, resulting in incorrect data. |