HYPACK HELP PATCH
Yaw Lines Yaw Runlines are meant to be Parallel to one another, however, in order to achieve 50% overlap throughout the entire Runline, the Boat Operator should follow the outside edge of the 1st Runline (As shown with the Yellow Line) Will be covered in detail at later session Emphasize that Patch Test is a QC function … NOT a QA operation as is a Performance Test Need be performed only periodically … equipment change. Therefore, the Boat Operator should run the Latency, Pitch, and Roll lines as close to Nadir beam over Nadir beam, from one pass to the next. The more precise that the Boat Operator can run the Patch Test lines, the better the results will be. Not a daily event Test question … does not correct Heave Two Slopes help to better define the Correction Value for the Test being performed HYPACK® 2012 Training SeminarĪlso keep in mind that your Boat Operator will make or BREAK your Patch Test. Patch Test Lines If Possible, Find areas similar to these for Yaw, Pitch, and Latency Runlines Will be covered in detail at later session Emphasize that Patch Test is a QC function … NOT a QA operation as is a Performance Test Need be performed only periodically … equipment change. Not a daily event Test question … does not correct Heave Vertical Separation HYPACK® 2012 Training Seminar
Not a daily event Test question … does not correct Heave HYPACK® 2012 Training Seminarīecause the Pitch Test runs lines in opposite directions, a Squat issue may come into play, due to a strong current, so be sure to extend each Runline well into the ‘Flat’ Area This will allow you to verify whether a ‘vertical’ adjustment will need to be made during the Pitch’s Patch Test NOT compensating for this ‘vertical’ offset will cause significant errors in the Pitch Test values Will be covered in detail at later session Emphasize that Patch Test is a QC function … NOT a QA operation as is a Performance Test Need be performed only periodically … equipment change. Patch Test Lines Typical Slope ‘Shift’ feature for Yaw, Pitch, and Latency Runlines Will be covered in detail at later session Emphasize that Patch Test is a QC function … NOT a QA operation as is a Performance Test Need be performed only periodically … equipment change. It won’t matter that your offsets are still zero, this is only for your runline setup. Once you have located an area for your Patch Test, collect some data with your multibeam, over this area, in order that you can properly orient your Patch Test runlines with the bottom features needed. Try to find existing hydrographic charts Locate the Flat area needed for the Roll Test Locate the Sloped area for the Latency, Pitch, and Yaw Tests If known, locate an object (sunken boat or car, old bridge pier, rock pile, etc.) and use it. Not a daily event Test question … does not correct Heave HYPACK® 2012 Training Seminarįinding Area to perform a Patch Test This may be more difficult than it seems. Will be covered in detail at later session Emphasize that Patch Test is a QC function … NOT a QA operation as is a Performance Test Need be performed only periodically … equipment change.
Yaw: Lines C D, E F Offset lines, sloping bottom. Roll: Line A B Reciprocal lines, flat bottom. Patch Test Lines Single Head Latency: Line C D Same line and direction Differing speed, sloping bottom (Watch for settlement differences.) Pitch: Line C D Reciprocal lines, sloping bottom. Not a daily event Test question … does not correct Heave YAW: Flat bottom to an object or - Sloped bank feature - Parallel offset lines that are run in the Same direction - Same / Equal speeds HYPACK® 2012 Training Seminar ROLL: Flat / Smooth deep bottom - Opposite / Reciprocal lines - Same / Equal speeds LATENCY: - Flat bottom to an object or - Sloped bank feature - Same direction lines - Unequal speeds PITCH: Flat bottom to an object or - Sloped bank feature - Opposite / Reciprocal lines - Same / Equal speeds Will be covered in detail at later session Emphasize that Patch Test is a QC function … NOT a QA operation as is a Performance Test Need be performed only periodically … equipment change.
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