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Abstract:This is a supplement to Service Vessel Analysis, Vol. I: Seagoing and Coastal Vessel Requirements for Servicing Aids to Navigation. The material included is not intended to stand alone but is prepared for use in conjunction with the original study. The analysis in Vol. I determines the number, mix, and home ports of vessels required to replace the aging fleet of WLB (seagoing) and WLM (coastal) buoy tenders currently servicing aids to navigation. Case studies were made with differing values of vessel speed, discrepancy response and other mission activity. The Service Force Mix (SFM) model is a computer implemented simulation which models the activities of vessels servicing aids to navigation. Given a list of Navigation aids which are assigned to available servicing vessels, the model simulates, for each vessel, the annual servicing of those aids and reports the resulting vessel performance. This analysis makes no recommendations but a possible scenario would suggest a replacement fleet of 31 vessels (17 seagoing, 14 coastal vessels), reducing the current fleet by 9m vessels. Determination of such savings might not have been obvious without the use of this modeling analysis technique. This document contains graphic plots of aid to the vessel assignments used in this study. (Author)
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