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2. RADAR, CHART RADAR OPERATION
2-29
2.22.8 Cursor
The cursor measures the range and bearing to an object, selects menu items, selects
location for mark entry, etc. For the B-type radar, you can select cursor attributes
(bearing reference, range unit and size for the cursor) on the [CURSOR] menu in the
[NAV TOOL] menu. For the IMO- and A-type radars you can select only the cursor
bearing reference, with [EBL/CURSOR BEARING] in the [EBL/VRM/CURSOR] menu
of the [NAV TOOL] menu.
2.23 How to Preset Controls for Specific Navigation
Purpose
Every time your navigating environment or task changes, you must adjust the radar,
which can be a nuisance in a busy situation. Instead of changing radar settings case
by case, it is possible to assign the function keys to provide optimum settings for often-
encountered situations.
The radar's internal computer offers several picture preset options to be assigned to
each function key for your specific navigating requirements. For instance, one of the
presets is labelled HARD RAIN, and is designed to be used in heavy rain.
Two user-programmable presets are also provided (labeled CUSTOM1, CUSTOM2),
so that you can have the radar automatically adjusted to those conditions that are not
covered by the provided setup options.
Below are the preset options provided with this radar.
Each picture option defines a combination of several radar settings for achieving op-
timum setup for a particular navigating situation. These include interference rejector,
echo stretch, echo average, noise rejector, automatic anti-sea and anti-rain clutters,
video contrast, pulse length and sea and radar conditions.
CURSOR BEARING: Show cursor bearing reference in true
or relative.
CURSOR RANGE: Show the cursor range indication in the
NM, SM, km or kyd. Not available with either IMO- or A-type
radar.
CURSOR SIZE: Select the cursor size for small or large. The
large cursor covers the entire echo area. Not available with
either IMO- or A-type radar.
Label Description Label Description
OCEAN Optimum setting for long
range detection, on a range
scale of 6 nm or larger.
ROUGH SEA Optimum setting for operation
in rough seas.
CANAL Optimum setting for operating
in a canal.
HARD RAIN Optimum setting for rough
weather or heavy rain.
BERTHING Optimum setting when
berthing.
CUSTOM1 User-defined custom
settings.
CONGESTION Optimum setting for short
range navigation (for exam-
ple, a harbor) using a range
scale of 1.5 nm or less.
CUSTOM2 User-defined custom
settings.