ISO 23765:2021

Ships and marine technology — Marine environment protection — Specification for collecting data on ship's fuel oil consumption

This document provides a method for ships of 5 000 gross tonnage (GT) and above to collect data on fuel oil consumption, as required by regulation 22A of MARPOL, Annex VI. It specifies practical methods to measure the fuel oil consumption, the distance travelled and the hours underway. Annex A provides an example of a ship fuel oil consumption data collection plan.

Navires et technologie maritime — Protection de l'environnement marin — Spécifications relatives à la collecte de données sur la consommation de mazout des navires

General Information

• Status: Published
• Publication Date: 20-Dec-2021
• ICS: 13.020.99 - Other standards related to environmental protection
• ICS: 47.020.99 - Other standards related to shipbuilding and marine structures
• Technical Committee: ISO/TC 8/SC 2 - Marine environment protection
• Drafting Committee: ISO/TC 8/SC 2/WG 11 - Ships’ energy efficiency data collection
• Current Stage: 9092 - International Standard to be revised
• Completion Date: 16-Nov-2023

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 23765
First edition
2021-12
Ships and marine technology —
Marine environment protection —
Specification for collecting data on
ship's fuel oil consumption
Navires et technologie maritime — Protection de l'environnement
marin — Spécifications relatives à la collecte de données sur la
consommation de mazout des navires
Reference number
ISO 23765:2021(E)
© ISO 2021

---------------------- Page: 1 ----------------------
ISO 23765:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021
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
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
  © ISO 2021 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 23765:2021(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Information on the ship and fuel oil consumers . 2
4.1 Ship particulars . 2
4.2 Ship fuel oil consumers . 3
5 Methods to measure the fuel oil consumption . 3
5.1 General . 3
5.2 Use of bunker delivery notes (BDNs) . 3
5.2.1 Annual fuel oil consumption . 3
5.2.2 Information from the bunker delivery note . 4
5.3 Use of flow meters . 5
5.4 Use of fuel oil tank monitoring . 5
5.4.1 Remote sounding gauge . 5
5.4.2 Manual sounding measurement . 5
6 Method to measure the distance travelled . 5
7 Method to measure the hours underway. 6
8 Aggregated data report .
...

INTERNATIONAL ISO
STANDARD 23765
First edition
Ships and marine technology —
Marine environment protection —
Specification for collecting data on
ship's fuel oil consumption
PROOF/ÉPREUVE
Reference number
ISO 23765:2021(E)
© ISO 2021

---------------------- Page: 1 ----------------------
ISO 23765:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021
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
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
PROOF/ÉPREUVE © ISO 2021 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 23765:2021(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Information on the ship and fuel oil consumers . 2
4.1 Ship particulars . 2
4.2 Ship fuel oil consumers . 3
5 Methods to measure the fuel oil consumption . 3
5.1 General . 3
5.2 Use of bunker delivery notes (BDNs) . 3
5.2.1 Annual fuel oil consumption . 3
5.2.2 Information from the bunker delivery note . 4
5.3 Use of flow meters . 5
5.4 Use of fuel oil tank monitoring . 5
5.4.1 Remote sounding gauge . 5
5.4.2 Manual sounding measurement . 5
6 Method to measure the distance travelled . 5
7 Method to measure the hours underway. 5
8 Aggregated data report . 6
9 Data quality control .
...