Raymarine e7 User Reference page 198

Fishfinder A-Scope mode
The A-Scope mode enables you to view a live (rather than historical)
image of the seabed and fish directly below your vessel.
The standard fishfinder display shows a historical record of fishfinder
echoes. If required, you can display a live image of the bottom
structure and the fish directly below the transducer by using the
A-Scope feature. The width of the bottom covered by the A-Scope
is indicated at the bottom of the window. A-Scope provides a more
precise and easier to interpret indication of the target strength.
There are three A-Scope modes:
198
Mode 1
The A-scope image is The left-hand side of
centred in the window. the Mode 1 image is
expanded to give a more
detailed view.
Mode 2 Mode 3
The A-scope image
angles outward as
signal width increases
with depth.
e7 / e7D — User reference