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Maritime – more useful snippets
Information of interest in the offshore industry is kept here.
HAIN (Hydroacoustically Aided Inertial Navigation) is a recent innovation from Kongsberg Maritime that provides much improved navigation of surface and underwater vehicles when used in conjunction with Kongsberg's HPR/HiPAP sonar positioning systems and APOS. It is also an essential part of the Hugin project.
There is not yet a strong base of HAIN expertise, but we have here a note about time synchronisation in the system that is not documented elsewhere.
HiPAP transponder frequencies always present a challenge when more than one vessel needs to use transponders in the same area. Here is a document that expands on the information in the Kongsberg manual, giving some strategies and tables that can be used to create a channel plan with the minimum of interference. There is a PDF version that is useful for printing out, or download an ODF version or MS Word version if you would like to make your own improvements.
Note by the author: I’ve come across a client who had downloaded this document and included it in its own documentation. I’m very flattered by that. I wasn’t so flattered by the fact that there was no attribution to Sealand, and our copyright information had been removed. By all means use this information that we have provided in a public forum, but treat it with the proper respect.