Compare direct trawl door- and wing-spread sensor records with an entered target and tolerance without inferring geometry from warp and depth.
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Reconcile direct, time-matched door- and wing-spread sensor records with an entered target and tolerance without inferring trawl geometry.
Compare calibrated door spread with the exact protocol target and tolerance.
Enter target/tolerance and direct door/wing sensor values from the same interval.
Sees tolerance status without an invalid warp/depth estimate.
Keep door and wing measurements distinct and preserve operating context.
Review sensor calibration, time, speed, depth, current, bottom and gear configuration externally.
Can flag a record without prescribing warp, doors or towing speed.
Avoid using one scalar result as catchability or tow-validity proof.
Apply the full survey protocol and quality review outside the worksheet.
Does not accept or reject a tow from this comparison alone.
Outputs and checklists are planning aids. Review the linked current authorities and the records, terms, instructions, and requirements that apply to your exact situation before a consequential decision.
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Enter calibrated, time-matched door- and wing-spread sensor records. Door spread and wing spread describe different parts of the trawl and remain separate in the output.
Measured door spread is compared with an externally selected target and tolerance from the exact vessel, gear, survey, or operating protocol. The worksheet does not set that target.
Interpret the record with sensor quality, towing speed through water, depth, current, bottom, warp, door type, bridles, net condition, and the full protocol. One comparison cannot validate catchability or tow safety.
Updated: August 2026
Compare time-matched measured door spread with the protocol target/tolerance while retaining direct wing-spread data.
Use the signed difference to find an interval for deeper review of calibration, speed, depth, current, bottom, doors, warps, and net condition.
Keep the comparison beside the full survey protocol and do not accept or reject catchability data from this scalar result alone.
Actual geometry also changes with towing speed, current, bottom, doors, bridles, net, and other conditions. Use direct calibrated spread sensors and the full operating protocol.
Record the sensor identity and attachment location. Door and wing measurements are not interchangeable and may respond differently to gear changes.
This tool reconciles direct trawl mensuration records with an entered target and tolerance. It replaces the prior unsupported warp/depth estimate and keeps operational and scientific judgment external.