Seatalk And Nmea In - Raymarine SL70M Owner's Handbook Manual

6-22
SeaTalk and NMEA In
®
The display can receive a comprehensive range of data. The primary data is
described below:
Table 6-3:
Data
Heading
Position
Waypoint
*Accurate heading data is required for MARPA, and it must be provided on
NMEA. We recommend the Pathfinder Smart Heading System (which
includes the Gyro Plus 2 unit) or a Raymarine autopilot system incorporating
a 150G or 400G Course Computer with internal rate gyro.
Heading data should ideally contain both magnetic and true heading. If only
one is available then variation needs to be provided either manually or
automatically - see Variation Source on page 5-8.
Some other radars and chartplotters can exchange their cursors via SeaTalk.
Locked heading should be used for Course Up if available via SeaTalk.
Other data connected via a SeaTalk bus or via NMEA is generally displayed in
data boxes, e.g. depth, apparent wind angle and speed, time.
Note: The Raymarine Fishfinder uses its own depth data, rather than 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 Fishfinder uses this data; if this data is not on SeaTalk from other
instruments, it is transmitted by the Fishfinder.
For details of received data refer to the table in Appendix B:SeaTalk and
NMEA Data Received and Transmitted.
SL70M & SL70C PLUS Pathfinder Radar Displays
Function of SeaTalk and NMEA Data
Primary Uses
Heading Modes
MOB (if Speed data also available)
MARPA (radar)
MOB (also requires speed and HDG
data)
Position data in data box and Nav
Window
Waypoints & Marks
Own vessel position (chart)
Data Log (chart)
Chart: Waypoint transfer
Suggested Source
Autopilot,
Compass connected to SeaTalk bus
NMEA Compass*
SeaTalk GPS connected via Auxiliary JB
Existing GPS Navigator via SeaTalk bus
Existing GPS (or Loran-C) navigator with
NMEA output
Existing GPS Navigator via SeaTalk bus
Existing GPS (or Loran-C) navigator with
NMEA output