Sea Launch obviously needs to ensure safe delivery, and this is why Boeing asked Lansmont to help them understand their particular ocean environment and its interactions with the vessel and cargo. A total of 8 complete instrument systems were used, mounted with steel plates at different locations across the cargo deck, to record the variations. This allowed us to estimate distortions across the span of the ship deck. The information we collected was, as expected, very low in both frequency and acceleration. The predominant frequency range was between 0.10 Hz and 0.15 Hz with an overall Grms of approximately 0.015.
More work is to be done.
Even the low-level data recorded is of potential concern to Sea Launch, and may result in design changes to the cradles which support the rocket stages during transport.