Installation Instructions

Display modes

This refers to a radar's display modes. There are four display modes depending on the

direction in which the top of the screen faces with respect to the ship.

Head Up (HU)

In this mode, the ship's heading always indicates the upward direction of the

screen. This mode lets you know the relative positions of your ship and other ships or

land.

North Up (NU)

In this mode, the north direction always indicates the upward direction of the

screen, allowing you to compare your ship position with a marine chart as you navi-

gate.

Course Up (CU)

The ship's heading in a course-up mode always indicates the upward direction of

the screen as the bearing toward the destination. In this mode, the ship can be ma-

neuvered to sail the shortest distance to the destination by steering it in such a way

that its heading marker always directs to the upward direction of the screen. If the

ship drifts due to tidal current, care must be taken because the fixed targets move to

other positions.

True Motion (TM)

In this mode, the ship is displayed as if it is moving on a marine chart while the

fixed targets such as islands and seashores are fixed in position. When the ship

reaches a certain position on the screen (approx. 2/3 of screen size), the ship is placed

back to the opposite side on the screen. (The top of the screen faces north.)

Note: Navigation equipment such as a gyrocompass or magnet compass must be con-

nected to your radar system before it can be operated in NU, CU, and TM modes.

(Refer to Section 3.9 for details on how to connect your radar to navigation equip-

ment.)

Ship's

Heading

North

Scheduled

course

EBL

North

mark

NU CU

Ship's locus

(not displayed on screen)

North

Scheduled

course

0.75

0. 25

0.25

0. 25

0.75

Fig.2-10 Display modes