Inmarsat C software and electronic unit

The transceiver includes an electronic unit (EU) and software. They should be allocated to the same computer using Exercise manager "Equipment" menu.
Features :
  • Inmarsat C telex
  • e-mail
  • SafetyNET
  • Function How to implement
    How to control the program
    The software can be controlled by keyboard and/or mouse. The main menu has pulldown menus which are selected and activated by using left/right arrow keyboard keys and pressing [Enter]. Also, use mouse to click/ double click a selected menu item.
    These are some common uses of keyboard keys accepted everywhere in the program:
  • [F1] - press any time to get help
  • [Enter] - select/activate an item
  • [Esc] - return back, exit or close window, cancel a change
  • [F5] - modify, start edit
  • [F10] - successfully complete, save and go on
  • [Del] - delete
  • [Ins] - expand a list
  • Prepare a message
    You can edit and save the text of message in files (see the first two menu items). Use keyboard to type the text :
  • keyboard keys to type the text
  • [Del] to delete a character over cursor
  • [Backspace] to delete a character to the left of cursor
  • [Enter] - start a new line
  • [Esc], [F10] - exit from editor
  • keyboard arrow keys to move the cursor
  • At exit, you will be asked to save the text in a file. Its file name will later be used when sending a telex.
    Send a message
    It is important to correctly specify message parameters:
  • select text file name from the list
  • most common network is telex
  • it is important to correctly specify telex country code, they are actually ocean region telex codes for MES-to-MES (ship-to-ship) communication : specify 581 - AOR-E, 582 - POR, 583 - IOR, 584 - AOR-W
  • [Esc] - cancel sending
  • [F10] - send the message
  • When sending a message, it is necessary to correctly specify an address (calling number). Below are some samples:

    For MES (Mobile earth Station, typically a ship) -to-land subscriber, telex call:
    Country code+Local telex number+Answerback(optional), e.g.
    56 (Country code) 71721 (Local telex number) 71721 umeb (Answerback, optional)

    MES-to-MES telex call i.e. another ship: enter, e.g.
    581 4 9 242 043 0
    where
  • 581 - Telex ocean region number instead of country code, 581 for AOR-E, 582 for POR, 583 for IOR, 584 for AOR-W
  • 4 - Ordinary call in Inmarsat-C
  • 9 - National Land Mobile Number
  • 242 - Mobile Country Code (MCC)
  • 043 - Station number
  • 0 - Auxiliary service identification


  • MES-to-MES data transmission call (X.25):
    581 (Data network identification code) 492420430 (As above for telex calls)

    Stored destination addresses can be chosen by clicking any item on the "Address" line and then [Ins].
    Edit destination directory
    The list of destination addresses can edited by selecting "Edit destination directory" from the "Edit/Send" menu.
    Receive messages
    If a message arrives, the indicator "Message" of the electronic unit is lit and "MESSAGE" is displayed at the lower left corner of the screen. Click "Receive messages" to transfer the message from the EU to the software for viewing.
    Logfile
    Logfile menu contains utilities to view, print out and delete a log of messages.
    Utilities
    "Utilities" set of items contains lots of tuning and configuration parameters.
  • Configuration - configuration menu described below
  • Ocean region information - not implemented
  • Tune to specified NCS - you can select an NCS and try to tune to it, in case the sattelite elevation for the current ship position is acceptable, the operation succeeds
  • Initiate LogIn and LogOut - login/logout to/from a LES, in case of a successful login, a "Login succeeded" is displayed at the lower left corner of the screen for some time
  • File/Disk utilities - are used to delete message files
  • Advanced utilities - some basic configuration parameters
  • Initiate PV test, Distress alert test and GetResults of last PV test - various tests are performed
  • Configuration
    This is "Configuration" menu:
  • Set EU in normal MES mode - in MES mode, all messages, including EGC Safety are accepted
  • Set EU in EGC-only mode - only EGC safety messages are received by the EU
  • Distress setup - distress parameters, like nature of distress, coordinates etc. are specified (the same as in "Distress" menu)
  • EGC SafetyNET, EGC FleetNET, EGC System - specify parameters which control receipt of EGC messages
  • Position - is used to manually specify actual ship position and set position update mode. If position update mode is set to "Navigator" and the exercise has a GPS receiver allocated for this ship using the Exercise manager "Equipment" menu, the ship position is updated automatically
  • UTC Date and Time - set date and time manually
  • Edit List of LES - a list of LES stations can be edited
  • Edit List of NCS - a list of NCS can be edited
  • Preferred ocean region - is selected
  • Initiate NCS channel scanning - a best NCS is selected, given your current ship position
  • Distress
    This is distress setup and sending. The parameters include
  • Manual/Navigator position update - it is highly desirable to set "Navigator" in Configuration/Position before menu and allocate a GPS receiver for this exercise
  • LES - distress calls are always set to the nearest RCC
  • Nature (of distress) - better to select it
  • Course and Speed - can be set manually
  • Undesignated distress can also sent by just pressing the SOS button on the EU.
    After sending an alert, an acknowledgement is awaited (look at messages at the lower left corner of the screen).