GMDSS. FCC Test 39 – Online Maritime Tests

With an Inmarsat-C CES, how are messages routed to receiving stations?

Direct connections are made to the receiving stations via gateways.
Intermediary stations are used to connect the sending station with the receiving station in a real-time mode.
Messages are stored until the network is polled by the receiving station.
All messages are forwarded via a store and forward network.

When sending digital information via an Inmarsat-A terminal, what should be utilized for optimum communications?

Why is the automatic answerback request (WRU) first used by the CES after an Inmarsat-A telex call has been placed from a ship?

What statement is true regarding Inmarsat-C?

There is a propagation delay, but a direct connection is made between the ship and shore users.
The telex message is stored until the mailbox is accessed by the station desiring to retrieve their message.
There are delays in establishing the communications then a direct real-time connection is maintained with the other party.
This is a store and forward network with an intermediate step that means there is no direct connection between ship and shore users.

What is the purpose of the second I.D. in an Inmarsat-A SES?

To provide an additional speech path which may be used to communicate while the first channel is engaged in active communications.
To provide an alternate number which may be called if a busy signal is received by the calling party.
To provide an additional number which may be dedicated to computers, fax, etc.
To provide for an emergency working frequency.

What are the directional characteristics of the Inmarsat-C SES antenna?

What is the average length of time required for a telex sent by Inmarsat-C to be delivered to the addressee?

All Inmarsat-C communications are made with real-time connectivity so there is no delay in message delivery.
The average delivery time for a message sent by Inmarsat-C is about 10 minutes.
Date/time notification of delivery is possible only through Inmarsat-A.
The average delivery time for a telex sent by Inmarsat-C is about 10 minutes, but fax and data messages sent by Inmarsat-C require about 30 minutes for delivery.

How is a signal radiated from an Inmarsat-C system's antenna?

It is a highly focused directional signal that must be beamed at the desired satellite.
It is radiated in an omni-directional pattern that can be reversed by the Operator to attain directional beaming to an alternate satellite.
It is radiated in an omni-directional pattern.
It is usually radiated in an omni-directional pattern, but an optional feature allows it to be directional for use when the vessel is on the fringe of the satellite's footprint.

What is the effect of having five periods (e.g.-meanwhile.....) in the text of a telex transmission on an Inmarsat-A SES?

This will automatically trigger the reversal of charges to the receiving party.
Only the first two periods will be routed to the receiving party.
The transmission will automatically terminate after those characters are transmitted.
Only the first period will be routed to the receiving party.

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