Choosing The Tilt Speed; Finding Echo Position With The Cursor - Furuno CH-270 Operator's Manual

3.7

Choosing the Tilt Speed

The [FAST SCAN] key chooses the tilt speed; that is, the stepping angle at which the
transducer scans. Two choices are available, 3 (normal speed) and 6 (high speed). Each
time the key is pressed the display momentarily shows "NORM" (normal speed) or "FAST"
(high speed).
Normal: 60 transmissions to complete a half circle, in increments of 3 .
High: 30 transmissions to complete a half circle, in increments of 6 .
The time required to scan one full area of 180 depends on range used and other factors.
The table below shows the time required to complete one full area on each range.
Ranges 1 2
Unit ft 30 60
Time
Norm 13 13
required
(sec) for
one full
Fast 9 9
180
area
Unit m 10 20
Time
Norm 13 13
required
(sec) for
one full
Fast 9 9
180
area
Note: Values shown are for reference purposes. Actual values may vary.
3.8

Finding Echo Position with the Cursor

The cursor measures horizontal range and depth. Operate the Omnipad to place the
cursor where desired. Cursor data appears at the top left-hand corner on the screen.
: Depth
3 4 5
90 120 150 200
13 13 13 13
9 9 9
30 40 60 80
13 13 13 13
9 9 9
Cursor data
: Horizontal range
Location of cursor position data
6 7 8 9
250 300 400
13 13 15
9 9 9 9
100 120 160
13 14 18
9 9 9 10
Cursor
3. VERTICAL SCAN MODE
10 11 12 13
500 600 800 1000
17 20 26 31
10 11 14 17
200 250 300 400
22 27 31 41
12 15 17 22
NAV
DATA
14 15
1500 2000
46 60
24 31
500 600
50 59
27 31
3-9