ISO INTERNATIONAL STANDARD 22554 Third edition 2023-07 Ships and marine technology Propeller shaft revolution indicators Electric type and electronic type Navires et technologie maritime - Indicateurs de vitesse d'arbre du propulseur- Type électrique et type électronique Reference number IS0 22554:2023(E) ISO IS02023 IS0 22554:2023(E) COPYRIGHTPROTECTED DOCUMENT @IS02023 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on or ISoO's member body in the country of the requester. ISO copyright office CP 40i : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email:[email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2023- All rights reserved