Raymarine hsb2 PLUS Series - Seatalk and NMEA in

Chapter 8: Installation 8-23
SeaTalk® and NMEA
In
SeaTalk
®
and NMEA In
The displaycan receive a comprehensiverange of data. The primarydata is
describedbelow:
*Accurateheading data is required for MARPA, andit must be provided on
NMEA. We recommendthe PathfinderSmart Heading System (which
includesthe Gyro Plus 2 unit) or a Raymarine autopilotsystem incorporating
a 150G or 400G Course Computer with internalrate gyro.
Headingdata should ideally containboth magnetic and true heading.If only
one isavailable then variationneeds to be providedeither manually or
automatically - see Variation Source on page 7-8.
Some otherradars and chartplotterscan exchange their cursors via SeaTalk.
Lockedheading shouldbe used for Course Up if availablevia SeaTalk.
OtherdataconnectedviaaSeaTalkbusorviaNMEAisgenerallydisplayedin
databoxes, e.g. depth,apparentwind angle and speed, time.
Note:The Raymarine Fishfinder uses its own depth data, ratherthan any oth-
er depth data on SeaTalk. If there is no other depth data on SeaTalk, Fishfind-
er depth is transmitted. If speed and temperature data are available on
SeaTalk the Fishfinderuses this data; if this data is not on SeaTalk from other
instruments, it is transmitted by the Fishfinder.
For detailsof receiveddata refer to the tablein Appendix D:SeaTalk and
NMEA Data Received and Transmitted.Examples of SeaTalk and NMEA
systems are shown in Figure 8-13 and Figure 8-14.
Table 8-4: Function of SeaTalk and NMEA Data
Data Primary Uses Suggested Source
Heading Heading Modes
MOB (if Speed data also available)
MARPA (radar)
Autopilot,
Compass connected to SeaTalk bus
NMEA Compass*
Position MOB (also requires speed and HDG
data)
Position data in data box and Nav
Window
Waypoints & Marks
Own vessel position (chart)
Data Log (chart)
SeaTalk GPS connected via Auxiliary JB
Existing GPS Navigator via SeaTalk bus
Existing GPS (or Loran-C) navigator with
NMEA output
Waypoint Chart: Waypoint and route transfer Existing GPS Navigator via SeaTalk bus
Existing GPS (or Loran-C) navigator with
NMEA output
81186_3.book Page 23 Thursday, August 22, 2002 8:23 AM