SIST EN ISO 8848:2021

SLOVENSKI STANDARD
oSIST prEN ISO 8848:2019
01-september-2019
Mala plovila - Daljinski sistemi krmiljenja (ISO/DIS 8848:2019)
Small craft - Remote steering systems (ISO/DIS 8848:2019)
Kleine Wasserfahrzeuge - Steueranlagen (ISO/DIS 8848:2019)
Navires de plaisance - Appareils à gouverner commandés à distance (ISO/DIS
8848:2019)
Ta slovenski standard je istoveten z: prEN ISO 8848
ICS:
47.020.70 Navigacijska in krmilna Navigation and control
oprema equipment
47.080 Čolni Small craft
oSIST prEN ISO 8848:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 8848:2019

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oSIST prEN ISO 8848:2019
DRAFT INTERNATIONAL STANDARD
ISO/DIS 8848
ISO/TC 188/SC 2 Secretariat: SIS
Voting begins on: Voting terminates on:
2019-06-28 2019-09-20
Small craft — Remote steering systems
Navires de plaisance — Appareils à gouverner commandés à distance
ICS: 47.080
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 8848:2019(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2019

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oSIST prEN ISO 8848:2019
ISO/DIS 8848:2019(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
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
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oSIST prEN ISO 8848:2019
ISO/DIS 8848:2019(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Constructional requirements . 3
5 Outboard engine and inboard-sterndrive requirements . 6
6 Steering system requirements . 8
7 Installation .11
8 Test requirements .14
8.1 General .14
8.2 As-installed tests .14
8.3 Component test .15
9 Markings, owner’s and installation manual .18
9.1 Markings .18
9.2 Owner’s manual .19
9.3 Installation manual .19
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2013/53/EU aimed to be covered .20
Bibliography .21
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oSIST prEN ISO 8848:2019
ISO/DIS 8848:2019(E)

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
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
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
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 188, Small Craft, SC 2, Engines and
propulsion systems.
This second edition of ISO 8848 cancels and replaces ISO 8848:1990, ISO 9775:1990 and ISO 15652:2003.
The main changes compared to the previous edition are as follows:
— consolidation of ISO 8848, ISO 9775, and ISO 15652 into this document;
— definitions are updated;
— requirements to meet current industry practices are updated;
— steering wheel requirements and tests are removed.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
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oSIST prEN ISO 8848:2019
ISO/DIS 8848:2019(E)

Introduction
This standard specifies design, construction and installation requirements for remote mechanical
cable steering systems and the major components thereof, for outboard, inboard, sterndrive, and water
jet drive small craft.
The standard defines requirements for steering systems that can be utilized in three distinct classes of
steering systems for use on various types of craft:
— standard for small craft with single and twin installations of outboard engines of over 15 kW power,
and all inboard engines, sterndrives, and water-jet drives;
— light duty for small craft with a single outboard engine of 15 kW to 40 kW power;
— mini-jet for small inboard jet craft weighing less than 1 000 kg, excluding personal watercraft.
Standard and light duty steering systems are mechanically interchangeable. A standard steering system
may be used on a craft designed for a light duty system. However, a light duty steering system may not
be used on a craft that requires a standard steering system. Mini-jet steering systems are mechanically
differentiated from the previously mentioned systems and may only be used on mini-jet craft as defined
in this standard.
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oSIST prEN ISO 8848:2019

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oSIST prEN ISO 8848:2019
DRAFT INTERNATIONAL STANDARD ISO/DIS 8848:2019(E)
Small craft — Remote steering systems
1 Scope
This document specifies the minimum level of requirements for design, construction, and installation
and test methods for remote mechanical cable steering systems, used for the following categories:
— push-pull cable steering systems for small craft with single and twin installations of outboard
engines of over 15 kW power, and to the connection point to all inboard engines, sterndrives, and
water-jet drives;
— steering systems for all small inboard jet craft weighing less than 1 000 kg, excluding personal
watercraft.
This document does not address emergency means of steering the craft.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 10240, Small craft — Owner’s manual
ISO 10592, Small craft — Hydraulic steering systems
ISO 12217 (all parts), Small craft — Stability and buoyancy assessment and categorization
ISO 23411, Small craft – Steering wheels
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 https: //www .iso .org/obp
3.1
craft-mounted steering system
assembly including all components necessary to transmit remote manual effort to the end of the output
ram and a means to secure an output ram guide tube to the craft
3.2
console
structure that contains the steering helm, shift and throttle controls, switches, and instruments for use
in the operation of a craft
3.3
control element
steering wheel, handlebar or joystick
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oSIST prEN ISO 8848:2019
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3.4
control station
console and its operating and/or controlling components, the location in the craft from which active
steering, shift and throttle control may be achieved
3.5
drag link (link rod or link arm)
device in a engine-mounted steering system by which the linear force of the output ram is transmitted
to the engine steering arm
3.6
handlebar
mechanical means for applying manual steering effort to the helm in a horizontal configuration with
hand grips at each end and the helm connected at the middle
3.7
helm
mechanism, exclusive of a steering wheel or other means for manual application of controlling force, by
which controlling force is fed into a steering system cable or other force-transmission means
3.8
joystick
operator input device for the simultaneous control of thrust, steering and propulsion
3.9
mini jet craft
craft weighing less than 1 000 kg with an inboard engine powering a water-jet pump as its primary
propulsion, designed to be operated with one or more persons within the confines of a hull
3.10
minimum retained system performance
system capability after test(s) such that at least 90 % of the steering arc normally available each side of
the mid-position may be obtained by exertion of no more than 27 N∙m of torque at the helm, through the
steering wheel or other normal control
Note 1 to entry: This criteria does not define steering system performance while a craft is underway but is
intended to provide quantitative limits for design and test purposes.
3.11
engine-mounted steering system
assembly including all components necessary to transmit remote manual effort to the end of the
output ram which is affixed to an engine mounted steering tube and a drag-link supplied by the engine
manufacturer
3.12
multiple engine installation
multiple engines, normally used simultaneously for a craft’s main propulsion, controlled by a common
steering system
3.13
steering system
assembly including all components necessary to transmit remote manual effort to the rudder, outboard
engine, inboard, sterndrive or water-jet drive
3.14
two-cable steering system
two independent cables attached at the interface point(s) of the ram(s) and at the helm and driven by a
common steering shaft; a system generally used to minimize steering backlash or lost motion
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oSIST prEN ISO 8848:2019
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3.15
steering wheel
mechanical means for applying manual steering effort to the helm, normally a circular configuration
with a continuous loop at the distal end of support spokes with the helm connected at the rotational axis
3.16
steering wheel diameter
the diameter of the circle formed by the outermost sections of the steering wheel, see Figure 6
3.17
steering wheel dish
the distance between the two parallel planes formed by the aft rim surface and the forward hub surface
of a steering wheel, see Figure 6
3.18
downflooding height
smallest height above the waterline to any downflooding opening, apart from those excluded in
ISO 12217 when the craft is upright in calm water and in the maximum load condition, measured to the
critical downflooding point which might be within pipes or ducts inside the hull
Note 1 to entry: Downflooding height is expressed in metres.
3.19
craft
small craft
recreational craft, and other watercraft using similar equipment, of up to 24 m length of hull (LH)
3.20
standard duty remote mechanical steering system
remote mechanical steering system designed to the requirements of this standard for use on small craft
with outboard engines (single and dual) 15kW and greater power, inboard engines, inboard engine
sterndrives, and water-jet drives
3.21
light duty remote mechanical steering system
remote mechanical steering system designed to the requirements of this standard for use on small
craft with single outboard engines between 15 kW and 40 kW power that is permanently marked with
a maximum power rating of 40 kW
3.22
mini-jet inboard jet craft remote mechanical steering system
remote mechanical steering system designed to the requirements of this standard for use on small craft
weighing less than 1 000 kg with inboard engines powering water-jet drives
4 Constructional requirements
4.1 When steering systems are factory-installed in the craft, the complete system shall be supplied. In
outboard engine craft, the system shall be supplied complete to the interface point at the ram output end
as shown in Figure 1.
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oSIST prEN ISO 8848:2019
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Dimensions in millimetres
Key
1 coupler nut
2 interface point
3 end fitting
NOTE Minimum travel: 100 mm each side of mid-travel position.
Maximum travel: 115 mm each side of mid-travel position.
Coupler nut 7/8-14 UNF-2B thread (optional for boat mounted systems).
Figure 1 — Output ram
4.2 Installation of the steering system shall be in accordance with the instructions provided by the
steering system manufacturer.
4.3 Craft suitable for twin outboard engines shall be so designated, and it shall also be specified
whether the craft is suitable for engine-mounted steering systems, craft-mounted steering systems or
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both. If the craft is suitable for craft-mounted steering systems, it shall also be specified whether engine
well mounting, transom mounting or both (see Figure 2) may be used.
a) Motor well mounting b) Transom mounting
Key
1 coupler nut
2 interface point
3 end fitting
NOTE Minimum travel: 100 mm each side of mid-travel position
Maximum travel: 115 mm each side of mid-travel position
If the swivel is mounted in the engine well side fitting, the engine well shall provide for 380 mm mid-travel
position from the swivel axis to the engine axis
Figure 2 — Craft-mounted steering system
4.4 Components of the steering system shall be resistant to corrosion, either by virtue of material or
coating thereof, and shall be galvanically compatible with adjoining components
4.5 All threaded fasteners whose integrity affects safe operation of the system such that separation
or loss of the fastener would cause sudden loss of steering without warning shall be provided with a
locking means.
4.6 Threaded fasteners whose integrity affects operation of the system, such that separation or loss
of the fastener would cause sudden loss of steering without warning, and that may be expected to be
disturbed by installation or adjustment procedures, shall be referenced by instructions for correct
assembly and shall either:
— be locked by a device whose presence is determinable by visual inspection, or by feel, following
assembly, or
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— incorporate integral locking means, provided the fastener cannot be omitted or substituted without
making the system inoperable.
NOTE Self-locking nuts with plastic inserts that create mechanical plastic interference meet the
requirements of this sub-clause.
4.6.1 Loose lock-washers, distorted thread nuts, or separately applied adhesives are prohibited.
4.6.2 Plain, threaded jam nuts are prohibited except that they may be used to permit adjustment and
shall be designed so that total separation of parts or other complete loss of steering will not occur should
they loosen.
NOTE Assemblies not intended to be disassembled for installation; the choice of locking means is within the
discretion of the system manufacturer.
4.6.3 A locking device shall be so designed that its presence can be determined by visual inspection or
feel by a layman after installation.
4.7 Connection fittings including quick-disconnect fittings relying only upon a spring or springs to
maintain the connection shall not be used.
5 Outboard engine and inboard-sterndrive requirements
5.1 The steering stops on the outboard engine shall permit at least 30° of angular movement to either
side of the centreline.
5.2 Outboard engines shall meet the applicable dimensional requirements indicated in Figures
1, 3, and 4.
Dimensions in millimetres
Key
1 motor axis
2 7/8-14 UNF-2A thread both ends
3 +02, 5
tube ø int. 16
0
NOTE The tube may be threaded equal length on both ends or reversible for port steering installations.
Figure 3 — Engine-mounted steering tube
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oSIST prEN ISO 8848:2019
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Key
1 steering axis
2 steering arm
3 transom mating surface
4 tilt axis
Figure 4 — Engine-mounted steering tilt axis
5.3 The necessary fittings to attach an outboard engine to the steering output ram shown in Figure 1
shall be supplied with the outboard engine.
5.4 The outboard engine shall be designed so that, with any combination of engine turn and tilt, there
shall be no damaging interference between the engine, its accessories, and both the craft-mounted
steering system installed as shown in Figure 2 and the engine-mounted steering system, provided the
engine is designed for both systems. Appropriate written information and installation instructions shall
be provided, clearly indicating the type of steering system(s) that should be used.
5.5 All mechanical and hydraulic parts of a power steering system transmitting steering forces shall
meet the applicable steering system component requirements in 8.2 and ISO 10592.
5.6 Outboard engines shall be designed so that the geometry ensures that the static loads defined
below, when applied at the steering-arm connection point normal to the steering arm in its plane of
operation, throughout the maximum steering arc, will not result in steering output ram loadings greater
than those specified in 0.
— 3 300 N for single and twin installations of outboard engines of over 15 kW power- 2 200 N for single
outboard engines of 15 kW to 40 kW power
5.7 The steering arm of the outboard engine shall be provided with a 3/8-24 UNF thread, or a plain
hole of 9,65 mm to 9,9 mm diameter at the connection point.
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5.8 Inboard-sterndrives shall be designed with proper geometry to ensure that a torque of 680 N⋅m
applied about the sterndrive steering axis will not result in a steering component loading greater than
that specified in 0.
6 Steering system requirements
6.1 Engine-mounted steering systems shall meet the dimensional requirements indicated in Figure 1,
Figure 3 and Figure 4.
6.2 Craft-mounted steering systems for outboard engine installations shall meet the dimensional
requirements indicated in Figure 1 and Figure 2. When a joint as shown in Figure 2 is replaced by a
universal joint with two movement axes, the axis perpendicular to the transom face shall be located 0 to
13 mm above the engine clamp bracket horizontal mounting face. The second axis shall be 100 mm to
115 mm from the inner surface of the transom and shall be not more than 28,5 mm from the first axis
toward the engine.
6.3 Steering Systems
6.3.1 Steering systems shall be capable of operating throughout a temperature range of -20 °C to +80 °C.
6.3.2 Storage Temperature Range - All materials used in construction of the system and its accessories
shall be capable of withstanding an ambient temperature of -40 °C to 85°C for at least 1 week duration.
NOTE This requirement is not intended to require operation at these temperatures, but is included to
determine that the system will withstand the stipulated storage temperatures.
6.3.3 Steering systems and components shall be capable of meeting the applicable test requirements
specified in this International Standard.
6.3.4 The steering system shall be capable of unobstructed movement throughout its full range of
intended cable travel without interference
6.3.5 For mini jet craft installations, ball joints used to connect the steering system to the jet drive shall
have redundancy such that axial failure of the ball-to-socket connection will not result in total loss of
steering.
6.4 Steering Cables
6.4.1 Steering cables shall be permanently marked with a dimension at the output end with a steering
system length which shall be the length from the steering wheel shaft centre to the hole centre in the
steering output ram at the mid-travel position.
6.4.2 The cable or steering-system output device shall provide the following amounts of travel:
— 100 mm - 115 mm on each side of mid-travel for single and twin installations of outboard engines of
15 kW and greater power, and all inboard engines, inboard engine-sterndrives, and water-jet drives.
— 89 mm – 95,4 mm on each side of mid-travel for inboard mini jet craft.
6.4.3 For single outboard engine of 15 kW to 40 kW power, the steering cable shall be permanently
marked by the manufacturer that the maximum power permissible is 40 kW.
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oSIST prEN ISO 8848:2019
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6.4.4 Cable or steering-system output devices for inboard mini jet craft shall following the mounting
requirements specified in Figure 5.
Key
a
mid-travel
Figure 5 — Output mounting configuration
6.4.5 Cable or steering-system output devices for single and twin installations of outboard engines of
over 15 kW power, all inboard engines, inboard engine-sterndrives, and water-jet drives and for single
outboard engines of 15 kW to 40 kW power shall not be interchangeable with steering cables for inboard
mini jet craft.
6.4.6 Ferrous metals used for the core of a steering cable, installed below the max load waterline, shall
be corrosion-resistant and equivalent to 300 series stainless steel.
6.4.7 The minimum bend radius of the cable shall be specified by the cable manufacturer.
6.4.8 Each cable in a two-cable system must individually meet the requirements of this standard.
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oSIST prEN ISO 8848:2019
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6.5 Helms
6.5.1 Installation instructions for steering helms shall include recommendations for the maximum
diameter and deepest steering wheel dish (see Figure 6) that may be used with the helm.
Key
1 dish
2 diameter
3 actual diameter
4 wheel level line
Figure 6 — Steering wheel terms
6.5.2 Helms that use a steering wheel shall be permanently marked on the helm assembly such that
the marking is visible when the steering wheel is removed with the manufacturer’s recommendation of
the largest steering wheel diameter and the deepest steering wheel dish that may be used.
6.5.3 Helms that incorporate a handlebar shall be permanently marked with manufacturer’s
recommendation of the largest handlebar length and greatest effective offset that may be used.
6.5.4 Helms that incorporate a joystick shall be permanently marked with the manufacturer's
recommendation of the largest stick allowed.
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6.5.5 Helms that use a handlebar or joystick shall be permanently marked with the manufacturer’s
recommendation of the largest envelope defined by Figure 7.
Key
1 diameter of steering wheel 4 actual length
2 actual diameter 5 standard length = actual length – 50
3 standard diameter = actual diameter - 50 6 dish
Figure 7 — Control elements
6.5.6 Helms for inboard mini jet craft shall incorporate travel stops to eliminate overloading of the
steering cable.
6.5.7 Helm assemblies for single outboard engines of 15 kW to 40 kW shall be permanently marked by
the manufacturer that the maximum power permissible is 40 kW.
6.6 Steering systems and components shall be capable of meeting the applicable test requirements
specified in clause 8.
6.6.1 Plastics and elastomers which may be exposed to sunlight shall be chosen to resist degradation
by ultraviolet radiation.
6.6.2 Plastics and elastomers which may be installed in engine compartments shall be chosen to resist
degradation by saline atmospheres, fuel, oil, ozone, and heat.
7 Installation
7.1 Except for installations specifically intended for craft or outboard engines with special
requirements, either the engine-mounted or the craft-mounted steering system shall be used.
7.2 If installing engine-mounted steering systems in outboard engine-craft, steering cables or other
force-transmission means shall be selected so that, as installed and at mid-travel position, the output
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...