Crane Motions Trial on CFAV QUEST


  1. MacLean, K.W.
  2. Perrault, D.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN)
A sea trial was conducted on the CFAV QUEST between November 20th and December 5th, 2008. One of the main objectives of the trial was to obtain time-series data which detailed the behaviour of the ship’s deck-mounted cranes while underway. Known masses were lifted with each crane and moved in predetermined patterns. Trial legs typically lasted between five and ten minutes each, and were conducted in seaways with significant wave heights ranging from 0.9 m to 4.0 m. Recorded data included information on the motions of the crane itself using an array of GPS antennas, sea state information collected from both moored and drifting buoys, and time-series ship motion data recorded from both Crossbow NAV420CA and DRDC Atlantic Ship Motion System equipment. This document provides a summary and graphical presentation of the crane motion data using three separate coordinate conventions, two of which account for the effects of ship motions. This information could be used for comparison with simulations of sea crane behaviours. Code for generating this data is provided with explanation. Also examined is the possibility of generating ship motion data from GPS antennas mounted on the ship. Data generated in this fashion was employed to perform a time synchronization study between the different ship motion equipment. Observed trends indicate that ship motion measurement systems had incorrect clock speeds. Ship motion information generated from GPS data have also been shown to be reliably a

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Report Number
DRDC-ATLANTIC-TM-2010-236 — Technical Memorandum
Date of publication
01 Dec 2010
Number of Pages
Electronic Document(PDF)

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