Beacons are installed to locate and track instruments, and are typically used during the recovery of subsea moorings. They can be satellite, radio, or Xenon models. With satellite beacons, when a mooring is released from the seafloor using an acoustic release, the location of a surfaced mooring is received by satellites that collect messages from a beacon. The messages and measured frequencies are relayed to processing centers via ground stations. The location of the transmitting beacon can be calculated accurately to within 150 metres. Similiarly, when radio beacons surface, they trasmit a pulsing radio frequency signal, often VHF, that is detectable within a certain range. Surfaced Xenon models, or Flashers, emit a Xenon light flash that can be detected when within visual range.
Individual instruments of the above category, which are (or have been) connected to our observatories. Click an instrument for detailed information.
Click the instrument categories below for descriptions and lists of instruments belonging to that category.