Also, we would love to obtain good video footage of Sea Catches in use for our promotional efforts.
The answer was a combination of 660 Seaflex 5-ton Mono Buoyancy Units (MBUs) with a Sea Catch TR7 for each MBU. Once the pipelines were in position, the air was release from the bags allowing the pipelines to settle on the river bottom before the deflated bags were disconnected from the pipeline by pulling the Sea Catch release lanyard at the surface.
It later was found out that the main reason for requesting a diver-less buoyancy release system was the risk from local inhabitants..... pythons and crocodiles (like this one recently caught nearby)! Photos courtesy of Graham Brading.
^News item 11-20-02: (right photo) Sea Catch made its debut in the aerospace industry today as part of the ground support equipment release for the spectacular and successful first launch for Boeing Delta IV from Cape Canaveral Air Force Station, Fla. The rocket delivered the commercial telecommunications satellite W5 for Eutelsat S.A. to orbit approximately 37 minutes after liftoff. The Delta team is pleased with the Sea Catch performance and anticipates use of the product in forthcoming Delta IV launches.