US4491966A — Maritime telecommunications system

Claim 1

Independent Claim 125 words

A radio system for automated shipboard operation comprising: a plurality of HF radio receivers; a plurality of HF radio transmitters; an automatic error request (ARQ) unit with which one of said receivers and one of said transmitters is associated; a digital selective calling (DSELCALL) unit with which another of said receivers and another of said transmitters is associated; means, including a digital computer to (1) scan the receiver associated with said DSELCALL unit among preselected DSELCALL frequencies, (2) to associate said one receiver and one transmitter with said ARQ unit in accordance with a message received by said DSELCALL assigned receiver and decoded by said DSELCALL unit, and (3) to initiate a DSELCALL ready signal for transmission by the transmitter associated with said DSELCALL unit.

Claim 2

Dependent Claim 125 words

A radio system for automated shipboard operation comprising: a plurality of HF radio receivers; a plurality of HF radio transmitters; an automatic error request (ARQ) unit with which one of said receivers and one of said transmitters is associated; a digital selective calling (DSELCALL) unit with which another of said receivers and another of said transmitters is associated; means, including a digital computer to (1) scan the receiver associated with said DSELCALL unit among preselected DSELCALL frequencies, (2) to associate said one receiver and one transmitter with said ARQ unit in accordance with a message received by said DSELCALL assigned receiver and decoded by said DSELCALL unit, and (3) to initiate a DSELCALL ready signal for transmission by the transmitter associated with said DSELCALL unit.

Claim 3

Dependent Claim 154 words

A radio system for automated shipboard operation, comprising: a plurality of radio receivers; a plurality of radio transmitters; an automatic error request (ARQ) unit with which one of said receivers and one of said transmitters is associated; a digital selective calling (DSELCALL) unit with which another of said receivers and another of said transmitters is associated; a video display terminal (VDT) unit upon which radio information and messages can be displayed upon reception and composed for transmission; means automatically responsive to control instructions entered into said VDT for selectively associating said receivers and transmitters with said DSELCALL unit and said ARQ unit in accordance with said control instructions, scanning said receiver associated with said DSELCALL unit among preselected DSELCALL frequencies, and controlling said transmitter associated with said DSELCALL unit in accordance with the frequency of said scanned receiver, and controlling the operation of said receivers and transmitters associated with said ARQ unit, as needed.

Claim 4

Dependent Claim 154 words

A radio system for automated shipboard operation, comprising: a plurality of radio receivers; a plurality of radio transmitters; an automatic error request (ARQ) unit with which one of said receivers and one of said transmitters is associated; a digital selective calling (DSELCALL) unit with which another of said receivers and another of said transmitters is associated; a video display terminal (VDT) unit upon which radio information and messages can be displayed upon reception and composed for transmission; means automatically responsive to control instructions entered into said VDT for selectively associating said receivers and transmitters with said DSELCALL unit and said ARQ unit in accordance with said control instructions, scanning said receiver associated with said DSELCALL unit among preselected DSELCALL frequencies, and controlling said transmitter associated with said DSELCALL unit in accordance with the frequency of said scanned receiver, and controlling the operation of said receivers and transmitters associated with said ARQ unit, as needed.

Claim 5

Dependent Claim 22 words

The system of claim 2 wherein said automatically responsive means controls the operation of all of said plurality of recievers and transmitters.

Claim 6

Dependent Claim 31 words

The system of claim 2 further comprising message printing means controlled by said automatically responsive means to provide a copy of selected messages received by at least one of said receivers.

Claim 7

Dependent Claim 23 words

The system of claim 2 wherein said plurality of receivers are three in number and said plurality of transmitters are two in number.

Claim 8

Dependent Claim 120 words

In a shipboard system of radio communications equipment, the improvement comprising apparatus associated with said system enabling messages to be addressed to the ship with which the radio communications system is associated, said enabling apparatus including means for automatically decoding the messages addressed at least to the ship with which the system is associated, and for providing at least the messages themselves, means for automatically interconnecting said radio communications equipment in response to a first set of the messages provided, means for automatically generating and transmitting acknowledgement signals in response to a second set of the messages provided, and means, responsive to a third set of messages provided, to transmit at least a portion of each of the essages provided.

Claim 9

Dependent Claim 120 words

In a shipboard system of radio communications equipment, the improvement comprising apparatus associated with said system enabling messages to be addressed to the ship with which the radio communications system is associated, said enabling apparatus including means for automatically decoding the messages addressed at least to the ship with which the system is associated, and for providing at least the messages themselves, means for automatically interconnecting said radio communications equipment in response to a first set of the messages provided, means for automatically generating and transmitting acknowledgement signals in response to a second set of the messages provided, and means, responsive to a third set of messages provided, to transmit at least a portion of each of the essages provided.

Claim 10

Dependent Claim 151 words

A shipboard radio telecommunications system comprising: a first HF radio receiver and transmitter; a second HF radio receiver and transmitter; an automatic error request (ARQ) unit within which said first HF radio receiver and transmitter are associated; a digital selective calling (DSELCALL) unit with which said second HF radio receiver and transmitter are associated; means, including a digital computer, to control the frequencies of said first and second radio transmitters and receivers and said ARQ and DSELCALL units, and to operate the DSELCALL unit to: scan a plurality of predefined DSELCALL frequencies; discontinue the scan upon reception by said DSELCALL associated receiver of tones on one of the scanned frequencies; determine the presence of "dots" on the frequency: decode the address on the signal received; determine whether the signal is intended for the ship with which the telecommunications system is associated; decode the message; and acknowledging the receipt of the message.

Claim 11

Dependent Claim 151 words

A shipboard radio telecommunications system comprising: a first HF radio receiver and transmitter; a second HF radio receiver and transmitter; an automatic error request (ARQ) unit within which said first HF radio receiver and transmitter are associated; a digital selective calling (DSELCALL) unit with which said second HF radio receiver and transmitter are associated; means, including a digital computer, to control the frequencies of said first and second radio transmitters and receivers and said ARQ and DSELCALL units, and to operate the DSELCALL unit to: scan a plurality of predefined DSELCALL frequencies; discontinue the scan upon reception by said DSELCALL associated receiver of tones on one of the scanned frequencies; determine the presence of "dots" on the frequency: decode the address on the signal received; determine whether the signal is intended for the ship with which the telecommunications system is associated; decode the message; and acknowledging the receipt of the message.

Claim 12

Dependent Claim 46 words

The shipboard radio telecommunication system of claim 7 wherein said means, including said digital computer further includes means to tune the receiver and transmitter associated with the ARQ unit to frequencies specified in the received signal and operate the ARQ unit to receive the signal transmitted.

Claim 13

Dependent Claim 29 words

The shipboard radio telecommunication system of claim 8 wherein said means, including said digital computer further includes means to: renew the scanning routine upon the completion of traffic reception.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1988-01-01	1988-07-02	1989-01-01	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1992-01-01	1992-07-02	1993-01-01	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1996-01-01	1996-07-02	1997-01-01	$7700.00	Window Closed / Lapsed

Maritime telecommunications system

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