Multiple Communication Channels
The ATLAS MultiCom system features several parallel communication links that enable the operator to control and monitor SeaCat missions:
- The main bidirectional communication channel for transferring commands and mission plans is based on WIFI. It is used mainly during the launch and recovery phases, when the SeaCat is at the sea surface. In direct line of sight conditions, it allows for a range of up to 400 m.
A fibre-optic cable allows for an operational radius of approximately 700 m by means of a cable of 1000 m length. The cable is wound onto a drum with a sliding coupling in its centre.
The acoustic underwater communication is a further bidirectional link enabling communication in a range of up to 2 km under water, depending on the environmental conditions to track or reroute the vehicle.
An Iridium satellite link is used to transfer the position of the vehicle to the Control Station. It works in surfaced condition only and is the main channel for re-locating the vehicle after a mission. The link also serves as safety feature in case of failure, allowing the determination of the position of the SeaCat and the initiation of recovery actions