Abstract: A capsize alerting apparatus (40) for a maritime vessel (10) is provided. The capsize alerting apparatus comprises an antenna (15) which is fixed on the maritime vessel in an orientation which permits communication with a receiver when the vessel is in a capsized state. The antenna is further operable when the vessel is in the capsized state to transmit a capsize alert message indicating that the vessel has capsized. Accordingly, by fixing an antenna to the vessel in an orientation which permits communication with a receiver when the vessel is in a capsized state, the vessel is able to communicate a capsize alert signal to a receiver (20) even though the vessel is in a capsized state in which a conventional communications system will not function.