ISO 19030-1:2016

INTERNATIONAL ISO
STANDARD 19030-1
First edition
2016-11-15
Ships and marine technology —
Measurement of changes in hull and
propeller performance —
Part 1:
General principles
Navires et technologie maritime — Mesurage de la variation de
performance de la coque et de l’hélice —
Partie 1: Principes généraux
Reference number
©
ISO 2016
© ISO 2016, Published in Switzerland
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ii © ISO 2016 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General principles . 2
4.1 Hull and propeller performance . 2
4.2 Ship propulsion efficiency and total resistance . 3
4.3 Primary parameters when measuring changes in hull and propeller performance . 4
4.4 Secondary parameters . 5
4.5 Measurement procedures. 5
4.5.1 General. 5
4.5.2 Data acquisition . 6
4.5.3 Data storage . 6
4.5.4 Data preparation . 6
5 Performance indicators . 6
5.1 Dry-docking performance: Change in hull and propeller performance following
present out-docking as compared with the average from previous out-dockings . 7
5.2 In-service performance: The average change in hull and propeller performance
over the period following out-docking to the end of the dry-docking interval . 8
5.3 Maintenance trigger: Change in hull and propeller performance from the start of
the dry-docking interval to a moving average at any chosen time . 9
5.4 Maintenance effect: Change in hull and propeller performance measured before
and after a maintenance event .10
6 Measurement uncertainties and the accuracy of the performance indicators .11
Annex A (informative) Method and assumptions for estimating the uncertainty of a
performance analyses process .13
Bibliography .30
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
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electrotechnical standardization.
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described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
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The committee responsible for this document is ISO/TC 8, Ships and marine technology, Subcommittee
SC 2, Marine environment protection.
A list of all parts in the ISO 19030 series can be found on the ISO website.
iv © ISO 2016 – All rights reserved

Introduction
Hull and propeller performance refers to the relationship between the condition of a ship’s underwater
hull and propeller and the power required to move the ship through water at a given speed. Measurement
of changes in ship specific hull and propeller performance over time makes it possible to indicate the
impact of hull and propeller maintenance, repair and retrofit activities on the overall energy efficiency
of the ship in question.
The aim of the ISO 19030 series is to prescribe practical methods for measuring changes in ship specific
hull and propeller performance and to define a set of relevant performance indicators for hull and
propeller maintenance, repair and retrofit activities. The methods are not intended for comparing the
performance of ships of different types and sizes (including sister ships) nor to be used in a regulatory
framework.
The ISO 19030 series consists of three parts.
— ISO 19030-1 outlines general principles for how to measure changes in hull and propeller performance
and defines a set of performance indicators for hull and propeller maintenance, repair and retrofit
activities.
— ISO 19030-2 defines the default method for measuring changes in hull and propeller performance
and for calculating the performance indicators. It also provides guidance on the expected accuracy
of each performance indicator.
— ISO 19030-3 outlines alternatives to the default method. Some will result in lower overall accuracy
but increase applicability of the standard. Others may result in same or higher overall accuracy but
include elements which are not yet broadly used in commercial shipping.
The general principles outlined, and methods defined, in the ISO 19030 series are based on
measurement equipment, information, procedures and methodologies which are generally available
and internationally recognized.
INTERNATIONAL STANDARD ISO 19030-1:2016(E)
Ships and marine technology — Measurement of changes
in hull and propeller performance —
Part 1:
General principles
1 Scope
This document outlines general principles for the measurement of changes in hull and propeller
performance and defines a set of performance indicators for hull and propeller maintenance, repair and
retrofit activities.
The general principles outlined and performance indicators defined are applicable to all ship types
driven by conventional fixed pitch propellers, where the objective is to compare the hull and propeller
performance of the same ship to itself over time.
NOTE Support for additional configurations (e.g. variable pitch propellers) will, if justified, be included in
later revisions of this document.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
hull and propeller performance
relationship between the condition of a ship’s underwater hull and propeller and the power required to
move the ship through water at a given speed
3.2
delivered power
P
D
power delivered to the propeller (propeller power)
3.3
speed through the water
V
ship’s speed through water for a given set of service (environmental) and loading (displacement/trim)
conditions
3.4
accuracy
described by trueness and precision, where trueness refers to the closeness of the mean of the
measurement results to the actual (true) value and precision refers to the closeness of agreement
within individual results
Note 1 to entry: See ISO 5725-1:1994, 3.6 and Introduction 0.1.
3.5
uncertainty
probability that the measurement of a quantity is within the specified accuracy to that quantity’s actual
(true) value
3.6
filtering
method of removing unwanted data
3.7
normalization
refers to the creation of shifted and scaled versions of statistics, where the intention is that these
normalized values allow the comparison of corresponding normalized values in a way that eliminates
the effects of specific influences
3.8
performance indicators
PIs
used to evaluate the effectiveness of, or to trigger, a particular activity
3.9
dry-docking
bringing the ship onto dry land to maintain, repair and/or retrofit the parts of the hull that are
submerged while the ship is in service
3.10
out-docking
period immediately following a dry-docking
3.11
dry-docking interval
period between two consecutive dry-dockings
4 General principles
4.1 Hull and propeller performance
Hull and propeller performance refers to the relationship between the condition of a ship’s underwater
hull and propeller and the power required to move the ship through water at a given speed. Hull and
propeller performance is related to variations in power, because ship hull resistance and propeller
efficiency are not directly measurable quantities.
2 © ISO 2016 – All rights reserved

4.2 Ship propulsion efficiency and total resistance
Hull and propeller performance is closely linked to the concepts of ship propulsion efficiency and ship
resistance. The performance model is based on the relation between the delivered power and the total
resistance where delivered power, P , can be expressed as Formula (1):
D
RV×
T
P = (1)
D
η
Q
where
R is the total in-service resistance (N);
T
V is the ship speed through water (m/s);
η is the quasi-propulsive efficiency (-).
Q
The total resistance consists of several resistance parts and can be written as Formula (2):
RR=+ RR++ R (2)
TSWAAAWAH
where
R is the still-water resistance (N);
SW
R is the added resistance due to wind (N);
AA
R is the added resistance due to waves (N);
AW
R is the added resistance due to changes in hull condition (fouling, mechanical damages, bulging,
AH
paint film blistering, paint detachment, etc.), (N).
Likewise, the quasi-propulsive efficiency consists of different efficiency components expressed as
Formula (3):
ηη= ηη (3)
Q0 HR
where
η is the open-water propeller efficiency;
η is the hull efficiency;
H
η is the relative rotative efficiency.
R
The added resistance due to changes in hull condition can be expressed as Formula (4):
P ×η
DQ
R = −+()RR +R (4)
AH SW AA AW
V
where
V is the ship speed through water, can be measured directly;
P is the delivered power, must be approximated – for example based on calculations of shaft
...