Furuno 525T-BHC, 525TID-BHD User Manual

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B258

The Cost Effective Choice

The B258 is 25 times more sensitive than a single-element 50/200 kHz transducer. This innovative 1 kW transducer makes 600 W ﬁshﬁnders perform like their more powerful big brothers—especially at 50 kHz. How does it do it? The B258 uses Airmar’s new and unique ceramic-element construction. The resulting narrow beams will clearly distinguish individual ﬁsh and bottom ﬁsh from their habitat at depths down to 670 m (2,200’).

Streamlined Performance

Maximize performance by installing the B258 with Airmar’s custom ﬁt High-Performance Fairing. At speeds over 30 knots (34 MPH), screen displays show clear images and a clean bottom trace.

Thru-Hull

1 kW Entry-Level

Fishing Applications

• The versatile 1 kW transducer for all types of ﬁshing

• Inshore and blue-water trolling

• Deep-water bottom and structure ﬁshing up to

500 m (1,640’)

Features

• Elliptical beam covers more bottom area thus

increasing your catch at all depths

• Depth and fast-response water-temperature sensor

• Recommended for sportﬁshing boats above 9 m

(30’) and small to mid-size commercial ﬁshing boats

• Four 50/200 kHz ceramics as compared to one

ceramic in 600 W units

• Provides greater surface area resulting in better

sensitivity

www.airmar.com

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B258

Technical Information

50/200 kHz-Blq

Number of Elements

and Conﬁguration

Beamwidth (@-3 dB) 15° x 21° 3° x 5°

RMS Power (W) 1 kW 1 kW

TVR 161 dB 173 dB

RVR -174 dB -183 dB

FOM -17 dB -9 dB

Q 9 15

Impedance 225 Ω 200 Ω

MAXIMUM DEPTH RANGE

50 kHz 200 kHz

441 m to 647 m 206 m to 294 m

(1,500’ to 2,200’) (700’ to 1,000’)

BEAM DIAMETER VS DEPTH

Depth 50 kHz 200 kHz

9 m

(30’)

30 m

(100’)

122 m

(400’)

305 m

(1,000’)

2.4 m x 3.3 m (8’ x 11’)

8 m x 12 m

(25’ x 40’)

30 m x 50 m

(98’ x 163’)

74 m x 124 m

(245’ x 407’)

0.6 m x 0.9 m (2’ x 3’)

1 m x 2.7 m

(5’ x 9’)

6 m x 11 m

(20’ x 35’)

16 m x 26 m

(52’ x 87’)

TRANSDUCER COMPARISON

Model Power Rating Performance Increase

B45

600 W Good Benchmark model for comparison

B744V

B744VL

B258 1 kW Better 25 times more sensitive at 50 kHz

16 times more sensitive at 200 kHz

B260

SS260

1 kW Best 50 times more sensitive at 50 kHz

13 times more sensitive at 200 kHz

R99 2 kW Superb 200 times more sensitive at 50 kHz

32 times more sensitive at 200 kHz

R209 R309

3 kW Ultimate 400 times more sensitive at 50 kHz

32 times more sensitive at 200 kHz

Due to the wide beam of the SS270W, it has been omitted from the table.

SPECIFICATIONS

Weight: 3.6 kg (7.9 lb)

Hull Deadrise: Up to 26° with fairing

Acoustic Window: Epoxy/urethane

DIMENSIONS

Transducer and High-Performance Fairing

198 mm (7.80”)

M30-2 threads

(6.00”)

152 mm

51 mm

(2.00”)

(4.20”)

107 mm

178 mm

(7.00”)

568 mm (22.35”)

B258 Transducer

36 mm (1.42”)

(4.25”)

108 mm

152 mm

51 mm (2.00”)

(6.00”)

181 mm

(7.13”)

M30-2

threads

(5.13”)

130 mm

(5.25”)

133 mm

As Airmar constantly improves its products, all speciﬁcations are subject to change without notice. All Airmar products are designed to provide high levels of accuracy and reliability, however they should only be used as aids to navigation and not as a replacement for traditional navigation aids and techniques. Xducer ID Technology Corporation. Other company or product names mentioned in this document may be trademarks or registered trademarks of their respective companies, which are not afﬁliated with Airmar.

is a registered trademark of Airmar