Fully compliant with IMO Resolution MSC.128(75), IEC 62616 (2010) and MED Wheelmarked with further Classification Society Type Approvals from RMRS, CCS, KR, CR and USCG, the Navitron NT990 BNWAS can be supplied as a basic system to operate proprietary alarm units (where appropriate) or, as an expanded system complete with alarm selector switch and individual officer cabin and crew call audible alarm units, etc. In either case, the NT990 BNWAS provides a safety monitor requiring regular acknowledgment (Reset) by the duty watch personnel at time intervals between 3 and 12 minutes which can be specified and set by the master or OOW as considered appropriate.