Furuno UAIS TRANPONDER FA-150 Operator's Manual page 115

APPENDIX
Output sentences
PIWWSPR - Inland AIS security password response
$PIWWSPR a, x, x, x, hh<CR><LF>
1. Mode (E: Password input, C: Password change)
2. Password level (1: Maintenance password, 2: User password
3. Valid time (0-60 (s))
4. Status (0: Pass, 1: Fail)
AP-26
4
3
2
1