056360/E
NAVITWIN IV
1-2
Design and Main Features
1.2 Design and Main Features
NAVITWIN IV
The Heading Management System NAVITWIN IV is a central control and
display device for multi-compass systems for the maritime navigation of
vessels.
The NAVITWIN IV has been type approved by Germanischer Lloyd (GL),
in association with the Marine Equipment Directive (MED) 96/98/ EC, as
amended, as Heading Management System optional with the Gyrocom-
pass Systems
NAVIGAT MK1 (certificate no. 94 418-10 HH, 94 428-10 HH),
NAVIGAT MK2 (certificate no. 94 420-10 HH),
NAVIGAT 2100 (certificate no. 94 416-10 HH, 94 426-10HH) and
NAVIGAT 3000 (certificate no. 37 757-12 HH, 37 957-12 HH).
The NAVITWIN IV is compliant with the requirements of DNV rules for
Ships Pt.6 Ch.8 and Ch.20 with regard to distribution of heading infor-
mation.
The automatic heading switch over functionality of the NAVITWIN IV as
part of a Grounding Avoidance System (GAS) is in compliance with rules
according to DNV Naut-AW.
The NAVITWIN IV provides a serial bidirectional interface for a central-
ized alarm management system (CAM) according to DNV class notation
NAUT-OC, NAUT-AW.
The NAVITWIN IV is also compliant with NAUT-AW/OSV class require-
ments for offshore service vessels (OSV), with deactivated Heading Dif-
ference Monitor and Off Heading Monitor functionality, see “Off
Heading Monitor Settings” on page 2-11, "Heading Diff. Monitor Set-
tings" on page 2-12 and "CAM Interface" on page 4-1 for details.
For further details see also "Declaration of Conformity" on page 1-14.
Depending on the system at hand, the NAVITWIN IV may be configured
to perform a number of different functions:
•
Heading source selector
The NAVITWIN IV displays heading data from up to three true head-
ing sources and one magnetic compass heading source.
By selecting the active heading source at the NAVITWIN IV, the oper-
ator determines which source is to be used as the reference for dis-
tribution via the Switch-Over Unit to other equipment, such as
compass repeaters, heading control systems, RADAR, ECDIS etc.
•
Heading difference monitor
NAVITWIN IV can monitor the difference between any two of the
connected heading sources. Should this difference exceed a user-
defined threshold, a “Heading Difference Alarm” is raised.
•
Off heading monitor
In automatic steering modes, NAVITWIN IV can monitor the differ-
ence between the actual heading from the active source and the
commanded set heading. Should this difference exceed a user-
defined threshold, an “Off Heading Alarm” is raised. The set heading
may be received automatically from a heading control system or
Содержание NAVITWIN IV
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