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2. Display Modes

1. Full circle searchlight
2. Zoom (x 1.5)
3. Vertical-fan scanning
4. Vertical sounding
5. Full circle search and Vertical scan
6. Full circle search with Historical display
7. Semi circle search and Strata display
8. Full circle search and Video Plotter

3. Color

8 or 16 colors, plus white

4. Audio monitor

1000 Hz

5. TX Output Power

0.8-1.2 kW

6. Beamwidth

(at -3 dB)

60 kHz

15˚ (H) x 12˚ (V)

88 kHz

11.5˚ (H) x 9.5˚ (V)

150 kHz

6.5˚ (H) x 6.5˚ (V)

7. Transducer Control

Tilt

0˚ to -180˚ at 3˚ or 6˚ steps (in vertical scan)
+5˚ to -90˚ at 1˚ steps (in full circle scan)

Training sector

Manual or automatic training at 6˚ or 12˚ steps 
in search sector of 6˚-360˚

Target Lock

By L/Lor Echo position

8. Interface

NMEA0183 Ver. 1.5, 2.0 (IEC 61162-1)

Input:

DBS, DBT, DPT, GGA, GLL, HDG, HDM, MDA, 
MTW, RMA, RMC, VDR, VHW, VTG

Output:

TLL

POWER SUPPLY

Display/Control unit

12-32 VDC, 55 W

Hull unit

12 or 24/32 VDC, 55 W
(200 W while raising/lowering transducer)

SPECIFICATIONS OF CH-250BB

REMOTE CONTROLLER 

(OPTIONAL)

CSH-256 
Weight 0.3 kg, 0.7 lb

INTERCONNECTION DIAGRAM

1. Range Scales and Pulse Length

150 kHz

Range

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

Meters

10

20

40

60

80

120

160

200

250

300

400

500

600

800

1000

Feet

40

80

120

200

300

400

500

600

700

800

1000

1500

2000

2500

3500

Fathoms

10

20

40

60

80

100

120

140

160

200

250

300

400

500

600

P/B

10

20

40

60

80

100

120

140

160

200

250

300

400

500

700

Time to train full circle

7

7

7

7

7

10

12/13

14/16

16/20

18/24

22/32

26/40

30/48

38/64

46/81

Max scale depends on the system frequency. 1600 m (60 kHz), 1200 m (88 kHz), 1000 m (150 kHz).
Training speed is subject to the system frequency and range scales. Two speeds on long range scales.

EMC AND ENVIRONMENT  

Complies with IEC 60945
Display Unit:

-15˚C to +55˚C

Water Resistance: IEC IPX5

EQUIPMENT LIST

Standard

1. Control Head

CH-252 

1 Unit

2. Hull Unit CH-254 (travel 400 mm) or

CH-255 (travel 250 mm)

1 Unit

3. Transceiver unit CH-253

1 Unit

4. Installation materials and spare parts

1 Set

5. Interface box IF-8000

1 Unit

6. Motion sensor MS-100 or Clinometer BS-7004

Optional

1. Non-Interlaced, Multi-sync PC Monitor (VGA 640 x 480)
2. Remote controller CH-256
3. Rectifier RU-1746B-2
4. External Speaker 
5. 1 m tall steel tank,

1.8 m tall steel tank,
3.5 m tall steel tank,
1 m tall FRP tank,
1.8 m tall FRP tank,
1 m tall aluminum tank 

6. NMEAcable

HULL UNIT

CSH-254 (Travel 400 m) 43 kg, 94.8 lb
CSH-255 (Travel 250 m) 42 kg, 92.6 lb

TRANSCEIVER UNIT

CSH-253 
Weight 3.2 kg, 7.1 lb

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE

Furuno USA, Inc. • 4400 NW Pacific Rim Blvd. • Camas, WA 98607 • Tel: (360) 834-9300 • Fax: (360) 834-9400 • www.Furuno.com

INTERFACE UNIT 

IF-8000 

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