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Section 1: Introduction
Thank you for purchasing this Lowrance Radar with the RIM 200 radar
interface module. Your radar consists of three main components: the
radar scanner unit, a display unit (sold separately) and the RIM 200
radar interface module which connects the scanner unit and the display
unit.
We know you’re anxious to begin the installation, but first, let us tell
you how this manual is organized.
The first section describes how your radar works. We'll also discuss is-
sues to consider when selecting an installation location as well as im-
portant safety requirements.
The second section will tell you how to install the radar scanner unit.
The third section covers installing the RIM 200 radar interface module.
Radar operation is covered in another manual that corresponds to your
display unit.
The radar scanner unit includes the radar antenna, transmitter, re-
ceiver and necessary electronics. The mounting hardware kit and inter-
connecting cable also are included with the radar scanner.
What is radar?
The word "radar" is an acronym for "RAdio Detecting And Ranging." In
simple terms, this is how it works:
A radio transmitter sends out a quick microwave pulse. A receiver lis-
tens for that signal's echo when it is bounced back from something in
its path. When it returns, it is processed by a computer to determine
relative distance, position and bearing of the object that reflected the
signal. This information is displayed on the display unit's screen. Other
boats or ships, navigational markers, landmasses and the like are re-
ferred to as targets.
By knowing how long it takes for a signal to return, the distance to a
target can be determined. As the radar antenna scans through a 360
degree rotation, it can show where the target is relative to your posi-
tion. By repeated scans, you can see which direction another vessel is
moving.
Antenna
How radar will perform is largely determined by its antenna or scan-
ner. Increasing the size of the antenna improves long-range perform-
ance and target discrimination — the ability to distinguish two sepa-