Raymarine FishFinder L265 User Manual download pdf (Page 40)

Operating Instructions

be broad. When using the narrower 200 kHz beam, the same fish will

produce a narrower arch.

The shape of the arch is also affected by the speed of the boat. If you are

moving slowly, the arches tend to be longer. If the boat is moving more

quickly, the arches are short and peaked. If the boat is moving very fast, a

fish may be indicated by a single vertical line.

Bottom Indications

The bottom usually produces a strong echo, so it is easy for the

FishFinder to see a lot of detail. The FishFinder can indicate many

different kinds of bottom conditions. See Fig. 3-6. A hard bottom appears

as a thin line. A softer bottom or a bottom covered with seaweed will

produce a wide line, as the sound waves reflect from different layers of the

bottom. An uneven bottom which is covered with rocks or coral produces

a complex display like that shown in the last part of the Figure. The

bottom image is irregular, with long “tails” pointing upward. A wreck

produces a similar image.

When the White Line feature is turned on, the unit can display even more

information about the bottom. In Fig. 3-4, the FishFinder is getting a good

Hard

(Sand)

Rocks

Soft

(Mud)

Fig. 3-6

Bottom

Conditions

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Raymarine FishFinder L265 User Manual Page 40