FLEET COMMUNICATIONS SYSTEMS

The systems for afloat units are compatible with those used ashore. Next, we will discuss the types of automated systems used afloat.

NAVAL MODULAR AUTOMATED COMMUNICATIONS SYSTEM

The Naval Modular Automated Communications System (NAVMACS) is a shipboard message-processing system developed to meet command missions. The NAVMACS provides accurate, secure, and expedient communications for various classes of ships and flagships. The hardware, software, and fictional capabilities of the NAVMACS are based on the needs of individual ships and commands.

The current versions of NAVMACS are (V)1, (V)2, (V)2-MPD (message-preparation device), (V)3, and (V)5/(V)5A. NAVMACS capabilities are augmented in a building-block manner from the most basic system, (V)1, through the most sophisticated system, (V)5/(V)5A.

NAVMACS (V)1

The NAVMACS (V)1 configuration provides automation for the receipt and processing of up to four channels of incoming broadcast message traffic. This configuration provides one channel of incoming and outgoing high-speed satellite link message traffic from and to the CUDIXS (discussed shortly). The system incorporates the equipments and computer program necessary to perform the automatic address screening and management functions required in the processing of incomming messages. It also incorporates the storage, formatting, and accountability functions used in the ship-to-shore delivery of messages transmitted via satellite and the shore-to-ship delivery of messages received via broadcast and satellite.

NAVMACS (V)2

The NAVMACS (V)2 configuration provides the same message processing and delivery functions used in the (V)1 configuration for up to four channels of incoming broadcast message traffic. It provides one channel of incoming and outgoing high-speed satellite link message traffic from and to CUDIXS. The NAVMACS (V)2 configuration upgrades the (V)l system in the following ways:

Adds automatic MILSTRIP paper tape message processing;

Adds message output to medium-speed printers instead of low-speed printers; and

Uses magnetic tape program loading instead of paper tape loading.

NAVMACS (V)2-MPD

The NAVMACS (V)2-MPD configuration has the same capabilities as the NAVMACS (V)2 version but uses a different program for operator language and system printouts. The MPD program provides an additional capability for on-line message composition and editing ability, and outgoing message error analysis (before transmission). It also provides a proof copy with paper tape for off-ship transmission. The (V)2-MPD system consists of the same equipments as the (V)2 system with the addition of MPD units, which are modified video displays.

NAVMACS (V)3

The NAVMACS (V)3 configuration automates certain processing functions required in the handling of narrative messages. It serves as an afloat terminal within those communications networks using broadcast and point-to-point modes of operation on both conventional and satellite transmission paths.

The (V)3 configuration interfaces with up to four channels of fleet broadcast, and up to four channels of full-period termination send-and-receive circuits. It also interfaces with one channel of incoming and outgoing high-speed satellite link message traffic to and from CUDIXS.

The (V)3 configuration also interfaces with off-line torn tape and manual transmit/receive circuits of any type. The (V)3 system provides the capability of on-line message composition and on-line message retrieval fom magnetic tape.

NAVMACS (V)5/(V)5A

The NAVMACS (V)5/(V)5A system is an automated communications processing system capable of interfacing a mix of input/output channels. This system is enhanced with the addition of remote terminals for message input. It includes up to four incoming broadcast channels and eight itinerant, netted, and fully dedicated communication network channels. It also includes one incoming/outgoing high-speed satellite link with CUDIXS and onboard peripheral devices.

The (V)5/(V)5A system includes a remote terminal capability for direct input/output of narrative and data pattern messages to high-volume onboard user areas. Remote terminals consist of a medium-speed printer, video display, and paper tape reader/punch, or a combination thereof, depending on the unique requirements of the various remote terminals.