Fuel and financial savings
for operators of small
fishing vessels

by
J.D.K.Wilson
Maputo, Mozambique

FAO - Food and Agriculture Organization
of the United Nations

FAO
FISHERIES
TECHICAL
PAPER

383

Table of Contents

PREPARATION OF THIS DOCUMENT

INTRODUCTION
Background
Aim of this guide
Sources of energy inefficiency

OPERATIONAL MEASURES
Engine operation
Slowing down
Engine performance
Engine maintenance
Hull condition
Fouling
Roughness
Fishing operations
Autonomy
Fishing technology
Navigation
Sail-assisted propulsion

TECHNICAL MEASURES
The propeller
Factors affecting propeller efficiency
Propeller design - have you got the correct propeller?
Hull design
Water flow into the propeller
Hull form
Engines
How big?
Choice of engine type
Engine installations
Exhaust and air flows

Annex 1
Record keeping

Annex 2
Decision assistant

Annex 3
A guide to optimum speed

Annex 4
Crouch's propeller method

BIBLIOGRAPHY

The designations employed and the presentation of material in this publication do not imply the expression of any opinion whatsoever on the part of the Food and Agriculture Organization of the United Nations concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries.

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying or otherwise, without the prior permission of the copyright owner. Applications for such permission, with a statement of the purpose and extent of the reproduction, should be addressed to the Director, Information Division, Food and Agriculture Organization of the United Nations, Viale delle Terme di Caracalla, 00100 Rome, Italy.

FAO 1999