- Global positioning system tag - communicates with GPS satellites to establish position with high accuracy, but only when the tag or animal is on land or at the water surface - Fastloc Global positioning system tag - GPS tag for aquatic animals that surface or haul out, when the tag locks onto the GPS satellite network to establish position with high accuracy - Pop-up satellite archival tag - after some period of time recording sensor data, the tag detaches itself from the animal and floats to the surface where it uses satellite connectivity to uplink the data stored on the tag - Acoustic tag - attached to the animals being tracked emit acoustic signals (typically ultrasound) which travel through water much better than RF signals. These signals are then received by buoys, which can then use satellite communications to backhaul the data to where it’s needed.