ComNav Mariner X2 AIS Class B Transceiver w/Built-in GPS - Must Be Programmed Ships within United States Free shipping with Fishbrain Pro. Sign up here. Share Loading Facebook Like button... ComNav Mariner X2 AIS Class B Transceiver w/Built-in GPS - Must Be Programmed Ships within United States Free shipping with Fishbrain Pro. Sign up here. Share Loading Facebook Like button...