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AUV Operations
SEAL is operated without dedicated Launch and Recovery system (LARS). Usually, to operate the AUV on board the research vessel, just a capable crane is necessary - best would be to have a crane-hook distance of 10 m outboard. Alternatively, operation of AUV over a capable A-frame at stern of vessel is possible, as well. For deploy of AUV, the vehicle will be placed on sea-surface next to the vessel with crane and 2-fold deploy-rigg. Afterwards, it will be released and piloted backwards away from research vessel remotely, via RF-link.
Prior to AUV mission start, a final test will be conducted nearby the vessel. Therefore, the AUV will dive and keeps it position in 30 m waterdepth for 10 minutes. During that time-span, functionality of underwater coms and positioning systems could be checked and finally, the AUV could be sent to mission.
After completion of AUV mission, the AUV will be positioned at sea-surface, nearby the research vessel. With the assistance of a zodiac, a support-rope and the recovery-rigg will be placed on the AUV. Afterwards, the final recovery-line, guided through a sheave in the crane, will be connected to the recovery-rigg and the AUV will be pulled below the ships crane position. Finally, the revovery rigg will be pulled into a lock-latch and the AUV could be winched up with the ships crane into deck position.
Prior to AUV mission start, a final test will be conducted nearby the vessel. Therefore, the AUV will dive and keeps it position in 30 m waterdepth for 10 minutes. During that time-span, functionality of underwater coms and positioning systems could be checked and finally, the AUV could be sent to mission.
After completion of AUV mission, the AUV will be positioned at sea-surface, nearby the research vessel. With the assistance of a zodiac, a support-rope and the recovery-rigg will be placed on the AUV. Afterwards, the final recovery-line, guided through a sheave in the crane, will be connected to the recovery-rigg and the AUV will be pulled below the ships crane position. Finally, the revovery rigg will be pulled into a lock-latch and the AUV could be winched up with the ships crane into deck position.