Simrad PI PORTABLE HYDROPHONE - INSTALLATION REV C Bedienungsanleitung

Simrad PI

Catch monitoring system

Portable hydrophone with paravane arrangement

Installation manual

M A X I M I Z I N G Y O U R P E R F O R M A N C E A T S E A

www.simrad.com

851-164730 / Rev.C

Simrad PI

Catch monitoring system

Portable hydrophone installation

Document information

Rev Date Written by Checked by Approved by

Rev.C 06.06.05 RBr KRa KRa

Minor modifications. New illustrations.

ISBN 82-8066-056-9

No part of this work covered by the copyright hereon may be reproduced or otherwise

copied without prior permission from Simrad AS.

The information contained in this document is subject to change without prior notice.

Simrad AS shall not be liable for errors contained herein, or for incidental or

consequential damages in connection with the furnishing, performance, or use of this

document.

The equipment to which this manual applies must only be used for the purpose for

which it was designed. Improper use or maintenance may cause damage to the

equipment or injury to personnel. The user must be familiar with the contents of the

appropriate manuals before attempting to operate or work on the equipment. Simrad AS

disclaims any responsibility for damage or injury caused by improper installation, use

or maintenance of the equipment.

If you require maintenance on your Simrad equipment, contact your local dealer. You

can also contact Simrad using the following e-mail address: fish-s[email protected]

Installation manual

851-164730 / Rev.C

Introduction

The purpose of this document is to provide general guidelines

for the installation and use of the PI portable hydrophone.

Order numbers

Portable hydrophone, complete; HYD-202713

Portable hydrophone, paravane arrangement kit: KIT-207284

Topics

→General guidelines, page 2

→Deployment over the side, page 3

→Paravane arrangement, page 4

→Storage, page 7

Simrad PI Catch monitoring system / Portable hydrophone

2851-164730 / Rev.C

General guidelines

The following must be taken into consideration when using

portable hydrophones:

•Sharp edges that could damage the hydrophone cable

insulation must be avoided.

•Do step on cable lying on deck.

•Do not place any objects (light or heavy) on top of cable

lying on the deck.

•The hydrophone cable must not be knotted, and kinking must

be avoided.

•When used, the hydrophone should be lowered deeper than

the vessel’s keel.

•Special care must be taken so that the hydrophone an/or cable

do not become fouled in the main propeller, thrusters or gear.

Installation manual

851-164730 / Rev.C

Deployment over the side

Unlike permanently mounted hydrophones, the portable

hydrophone has an omni-directional beam. It can therefore be

lowered below the level of high underwater noise and air

bubbles generated by the main propeller and bow/sternthrusters

which can block reception of hull mounted units.

(A) = Portable hydrophone

(P) = Port

(S) = Starboard

When the seine is normally located forward of the starboard

beam when pursing the following information should be taken

into consideration:

•The portable hydrophone is to be deployed over the port side

of the vessel, midships, as far away from bow or stern

thruster(s) used when pursing as possible.

•Note that the portable hydrophone’s location is opposite to

that of a permanently mounted unit. When pursing to

starboard the hydrophone is normally lowered over on the

port side of the vessel.

•The hydrophone cable should be made fast to the vessel’s

bulwarks.

Simrad PI Catch monitoring system / Portable hydrophone

4851-164730 / Rev.C

Paravane arrangement

The portable hydrophone available with the PI system has a

broad coverage area. For this reason, its orientation with regard

to the sensors is not that critical.

The hydrophone weighs approximately 700 grams (in salt

water) and can be mounted on a towed paravane. Simrad can

supply a simple solution for this. This solution is suitable for

smaller vessels, and it is made up of a little paravane and a

weight. The arrangement is designed to draw the portable

hydrophone down to approximate five to ten meters depth when

towed at a moderate speed (maximum of three knots). The kit

contains all necessary parts (except one!) as described in the

following illustration.

Order number: KIT-207284

Installation manual

851-164730 / Rev.C

Paravane arrangement, parts

The relevant part numbers in the arrangement kit are provided

in brackets.

(1) Towed hydrophone, portable type. Note that the hydrophone

is NOT a part of the paravane kit, it must be ordered seperately.

Order number is 314-203863.

(2) Paravane made of durable PVC plastic (598-079553).

(3) Paravane line, a two meter lengthofthinflaghalyard(orthe

equivalent) shackled to the round thimble and the middle of the

three holes available on the paravane (699-078608).

(4) Hydrophone cable, extending approximately a half meter aft

of the round thimble. Note that the length of the paravane line

(3) is four times longer than the hydrophone cable (4).

(5) Trolling weight, approximately 5 kg (598-079552).

(6) Hydrophone cable, maximum pay-out length approximately

forty meters (total cable length is 50 meters).

(7) Round thimble, to which a bight in the hydrophone cable is

seized to create an attachment point for the trolling weight and

paravane line (598-079551).

(8) Shackle, made of brass (409-078633)

(9) Swivel, used between the trolling weight and the round

thimble, shackles at each end (409-079550).

(10) Ring, made of stainless steel (409-078702).

(11) Shackle, made of stainless steel (409-086971).

(12) Seizing, used to secure a bight in the hydrophone cable to

the round thimble (not supplied in kit).

Simrad PI Catch monitoring system / Portable hydrophone

6851-164730 / Rev.C

Paravane deployment

All paravane installations require a boom or gantry capable of

towing the hydrophone a minimum of three to five meters

outboard of the vessel. This is important in order to avoid

interference caused by the main propeller turbulence.

Should a portable hydrophone be

towed in the wake of a vessel, its

range will be severely reduced due

to the associated main propeller

wash which is saturated with air

bubbles blocking the sensor

signals. Systems incorporating

hydrophones towed in this manner

can be expected to barely work, if

at all.

(A) Towed hydrophone, included

with portable type hydrophone

(314-203863).

(B) Paravane, included with

KIT-207284.

(D) Snatch block, not available

from Simrad.

(E) Boom, not available from

Simrad.

(F) Hydrophone cable, included

with the portable hydrophone.

(G) Bight, in hydrophone cable

secured with an elastic strop to

dampen dynamic stress on the

hydrophone cable, not available

from Simrad.

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