Selecting The Training Speed; Finding Echo Position With The Cursor - Furuno CH-250 Operator's Manual

2.7

Selecting the Training Speed

The training speed selects how fast the transducer scans the sounding sector. Two choices are
available, normal speed (default setting) and high speed, and one may be selected with the
[FAST SCAN] key. Each time the key is pressed "NORM" (normal speed) or "FAST" (high
speed) momentarily appears at the screen top.
Normal (6 ) : 60 transmissions required to complete full 360 picture (default setting).
High (12 ) : 30 transmissions required to complete the full 360 picture.
The time necessary to train a full circle depends on range and transducer used. The table below
shows the time required to complete one full circle in the horizontal mode using the 150 kHz
transducer.
Ranges 1
m 10
Unit
ft 40
Time
Norm 7
required
(sec) for
one full
Fast 7
circle
Note1: Above data for soundome having serial no. 1000 and higher.
Note2: The range setting must be at least 160 m to active high speed training, using the 150
kHz transducer. The [FAST SCAN] key is inoperative when the range setting is less
than 160 meters.
2.8

Finding Echo Position with the Cursor

The cursor measures horizontal range, depth and bearing. Operate the Omnipad to place the
cursor where desired. Cursor position data appears at the top left-hand corner on the screen.
B: Bearing
2 3 4 5 6
20 40 60 80 120
80 120 200 300 400
7 7 7 7 10
7 7 7 7 9
Cursor position data
: Horizontal range
: Depth
Figure 2-10 Location of cursor position data
7 8 9 10
160 200 250 300
500 600 700 800
13 16 20 24
11 13 15 17
NAV
DATA
Cursor
11 12 13 14
400 500 600 800
1000 1500 2000 2500
32 40 48 64
21 25 28 36
2-9
15
1000
3500
81
45