Inmarsat-A PC telephone, fax and voice band data calls ........................ (iI
Inmarsat-B PC telephone calls ................................................................... (i
Inmarsat-B PC fax and data calls ..................................... .......................... (i
Internet access and Internet electronic mail (e-mail) ............................... 65
Inmarsat·A and Inmarsat-B High Speed Data (HSD) ............................. 66
Inmarsat-A and Inmarsat-B PC Telex 6(i
Inmarsat-C Messaging Services ...................................... .................... ........ 67
Inmarsat-C FleetNET messages ....................... .......................................... (i!)
Cellular radio and non-G MDSS mobile satellite services ...................... 69
Questions from Chapter 4 ................................................. .......................... 73
Chapter
Distress, Urgency and Safety Communications
for Sea Areas Al, A2, and A3/ A4 .................................................... 74
- GMDSS equipment for Distress Alerts, from-ship -
and for Distress Relays, from-shore, by Sea Area .......... ................ ....... 74
Distress Communications - Sea Area Al (VHF procedures) .... ............. 75
ChI6 Voice Distress Procedures - Example - Sea Area AI .. ................. 76
Action onboard vessels receiving a VHF DSC Distress Alert 77
Distress Communications - Sea Area A2 (MF procedures) ................... 80
2182kHz Voice Distress Procedures - Example - Sea Area A2 ............. 81
Action onboard vessels receiving a DSC Distress Alert on 2187.5kHz .. .. .. 81
Distress Communications - Sea Areas A3 and A4 .................................. 84
Ship-to-shore Distress telephone call - Example -
Inmarsat-A and Inmarsat-B ..................................................................... 85
Ship-to-shore Distress telex message - Example -
Inmarsat·A and Inmarsat-B ............. ........................................................ 86
Ship-to-Shore Distress Alerts and Distress Priority Message
- Example - Inmarsat-C ................................................................ .......... 87
Ship-to-Shore Distress Procedures - Example - SSB Radio with HF DSC .... 90
Sea Area A3/ A4 ship-to-ship Distress Calls and messages ...................... 91
Action onboard vessels receiving DSC Distress Alerts
in Sea Area A3/ A4 ............ ........................................................................ 91
Distress Relay (radio procedures) ........................... .. .................................. 97
Voice 'Mayday Relay' procedures ............................................................ 100
Summary of Distress Acknowledgement/Distress Relay
(VHF / MF) rules ...................................................................................... 100
Summary of Distress Acknowledgement/Distress Relay (HF) rules 101
Action on receiving a DSC Distress Relay/DSC Distress
acknowledgement ................................................................................... 102
False DSC Distress alerts .................. ........................................................ 105
False alert sent on VHF Ch70 106
False alert sent on 2187 .5kHz .................... ................... ...... ........................ 107
False alert sent on 8414.5kHz ............................ ....................................... 108
Distress Procedure words .......................................................................... 108
Urgency (Pan Pan) communications ........................................................ 110
Action onboard other vessels in the vicinity of an Urgency situation .. III
Examples of Urgency communications - radio and satellite 111
Urgency Communications in an A2 Area - Example 113
Using Inmarsat-A/Inmarsat-B telephone communications to
make an Urgency call to a MRCC ........................................................ 114
vi THE NAUTICAL INSTITUTE
