Simrad SH90 - PRODUCT DESCRIPTION REV A Specifications download pdf (Page 23)

Operation of IS15 Combi

20220760L 21

MAG. VARIATION

The IS15 instruments automatically read the Magnetic Variation

compensation from a connected GPS. The compensation is

presented on the screen. You are not allowed to adjust the

compensation from the GPS. If you press the

button and

hold for 2 seconds the screen just flashes AUTO and returns to

show the compensation from the GPS.

If a GPS is not connected you will be able to enter the magnetic

variation manually using the

and buttons.

Screen 2

HEADING

COURSE OVER GROUND (COG)

SPEED OVER GROUND (SOG)

• The upper screen section displays ‘HDG’ (Heading) as on

screen 1.

• The middle screen section displays ‘COG’, Course Over

Ground similar to screen 2.

• The lower screen section displays ‘SOG’, Speed Over

Ground value and the unit, (e.g. ‘kts’).

Screen 2 has a sub screen for setting the magnetic variation.

Refer to above.

Screen 3

WAYPOINT ID

WAYPOINT BEARING

CROSS TRACK ERROR (XTE)

• The upper screen section displays the Waypoint ID.

• The middle screen section displays ‘BRNG WP’, the Bearing

to the waypoint in degrees and the unit (‘T’rue or

‘M’agnetic). See note on page 20.

• The lower screen section displays ‘XTE’, the Cross Track

Error (XTE) value and the boat position relative to the track

line. The XTE is shown for any error greater than 0.001 NM

if the XTE message contains three decimal points. Otherwise

it will show errors greater than 0.01 NM. The direction to

steer will be towards the track line. When the boat is on track,

the boat icon will disappear while the track line remains.

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Simrad SH90 - PRODUCT DESCRIPTION REV A Specifications Page 23