【正文】 /93 s 。 and ? ? Atsea maintenance (ASM). 2022 April GMDSS Services – Lecture 1 91/93 On ships trading in areas A3 and A4, this availability shall be ensured by using a bination of at least two of the following methods: ? ? Duplication of equipment (DOE)。 ? b) for stations on board ships which sail within the range of VHF coast stations, taking into account the provisions of SOLAS: a holder of a firstor second – class radio electronic certificate or a general operator’s certificate (GOC) or a restricted operator’s certificate (ROC)(2) 2022 April GMDSS Services – Lecture 1 88/93 Means of Ensuring Availability of Ship Station Equipment ? The SOLAS Convention requires that each country shall ensure that the radio equipment is maintained to provide the availability of those nine functions detailed above. 2022 April GMDSS Services – Lecture 1 89/93 3 maintenance methods: ? ? Duplication of equipment (DOE)。 RescueUnit that will then have the means to locate the distressed raft or vessel. 2022 April GMDSS Services – Lecture 1 77/93 2022 April GMDSS Services – Lecture 1 78/93 transmission and reception of maritime safety information ( MSI )。 ? A ship in distress can alert other ships in the vicinity by sending a DSC distress alert on VHF and MF, simultaneously if desired, and follow it up with a distress (MAYDAY) voice message on Channel 16 or 2182 kHz. Note that HF DSC is for longrange work and is intended primarily for alerting the shorebased authorities, especially if there are no ships in the vicinity. 2022 April GMDSS Services – Lecture 1 68/93 transmission and reception of search and rescue coordinatingmunications。 North and South, but excludes A1 and/or A2 designated areas 2022 April GMDSS Services – Lecture 1 58/93 2022 April GMDSS Services – Lecture 1 59/93 Sea Area A4 ? An area outside sea areas A1, A2 and A3. This is essentially the polar regions, north and south of about 70186。 Search and Rescue Radar Transponder (SART). 2022 April GMDSS Services – Lecture 1 34/93 2022 April GMDSS Services – Lecture 1 35/93 2022 April GMDSS Services – Lecture 1 36/93 ?NBDP (narrow band direct printing radiotelegraphy) 2022 April GMDSS Services – Lecture 1 37/93 2022 April GMDSS Services – Lecture 1 38/93 s SART 2022 April GMDSS Services – Lecture 1 39/93 2022 April GMDSS Services – Lecture 1 40/93 Inmarsat, COSPAS/SARSAT, Emergency Position Indicating Radio Beacons (EPIRBs), Status Recordingsystem (STAREC). 2022 April GMDSS Services – Lecture 1 41/93 Communication by means of the geostationary Inmarsatsatellites extends in an area between 70 degrees latitude North and 70 degrees latitude South. The 4 Inmarsatregions: Atlantic Ocean Region West (AORW)。s nest Iceberg right ahead. Murdoch ordered full stop, then full astern. At the same time he ordered a hard turn to port. Keep in mind that this order actually made the collision more certain. A short time later Captain Smith arrived on the bridge and asked Murdoch what had she hit. Captain Smith ordered various officers to check for damage assessment. 2022 April GMDSS Services – Lecture 1 18/93 A few minutes later damage reports started ing in, disastrous news for Captain Smith, at least five, possibly six of the watertight partments were flooding. Thomas Andrews, the ship designer had also made his way to the bridge and did not take long to confirm that she could not survive and would inevitably sink within a few hours. 2022 April GMDSS Services – Lecture 1 19/93 2022 April GMDSS Services – Lecture 1 20/93 2022 April GMDSS Services – Lecture 1 21/93 Most passengers at this point were unaware the seriousness of the collision or even that a collision had occur