Multi-Unit n:1 (fixed transmitter)
The Multi-Unit n:1 (fixed transmitter) case has any number of receivers on AUVs, ROVs or divers, with a single transmitter at a fixed location.
The position of each receiver relative to the transmitter is updated at 1 Hz.
If the absolute (latitude/longitude) position of the transmitter is known, and each receiver knows the fixed position of the transmitter, then each receiver can calculate its own absolute position. If the receivers do not know the transmitter's position, then they can each calculate their position relative to the transmitter.
If using only Cerulean-supplied equipment, the AUV/ROV/diver position is known only to the individual receiver. If you need to supply the AUV/ROV/diver position to the other units or to a topside monitoring system, then you must supply your own communication links and software support.
The Mk II model is the only ROVL model that can operate in this configuration. The receivers and transmitter must periodically address the relative clock drift (every hour or two) by periodically surfacing and re-acquiring the GPS signal.
It is possible to run two independent sets of autosync-capable ROVLs in a single operating area, by running one set on channel A and one set on channel B.
CeruleanTracker and CeruleanMap softwares do not support the n:1 configuration. Users must write their own software to make use of the positional information supplied.
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