RULES FOR CLASSIFICATION - Inland navigation vessels
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RULES FOR CLASSIFICATION
Inland navigation vessels
Edition August 2021
Part 6 Additional class notations
Chapter 4 Ferry
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DNV ASFOREWORD DNV rules for classification contain procedural and technical requirements related to obtaining and retaining a class certificate. The rules represent all requirements adopted by the Society as basis for classification. © DNV AS August 2021 Any comments may be sent by e-mail to rules@dnv.com This service document has been prepared based on available knowledge, technology and/or information at the time of issuance of this document. The use of this document by other parties than DNV is at the user's sole risk. Unless otherwise stated in an applicable contract, or following from mandatory law, the liability of DNV AS, its parent companies and subsidiaries as well as their officers, directors and employees (“DNV”) for proved loss or damage arising from or in connection with any act or omission of DNV, whether in contract or in tort (including negligence), shall be limited to direct losses and under any circumstance be limited to 300,000 USD.
CHANGES – CURRENT
Part 6 Chapter 4 Changes - current
This document supersedes the December 2015 edition of DNVGL-RU-INV Pt.6 Ch.4.
The numbering and/or title of items containing changes is highlighted in red.
Changes August 2021, entering into force 1 January 2022
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Rules for classification: Inland navigation vessels — DNV-RU-INV Pt.6 Ch.4. Edition August 2021 Page 3
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DNV ASCONTENTS
Part 6 Chapter 4 Contents
Changes – current.................................................................................................. 3
Section 1 Ferry........................................................................................................ 5
1 General................................................................................................ 5
2 Vessel arrangements........................................................................... 5
3 Scantlings............................................................................................ 5
4 Electrical installations..........................................................................6
Changes – historic.................................................................................................. 7
Rules for classification: Inland navigation vessels — DNV-RU-INV Pt.6 Ch.4. Edition August 2021 Page 4
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DNV ASSECTION 1 FERRY
Part 6 Chapter 4 Section 1
1 General
1.1 Application
1.1.1 Passenger vessels complying with the requirements of this chapter are eligible for the assignment of
the additional class notation Ferry, as defined Pt.3 Ch.2 Sec.2 [5.2.1].
1.1.2 These vessels are to comply with the requirements stated under Pt.5 Ch.5 Sec.1, as far as applicable.
2 Vessel arrangements
2.1 Sheathing
Wood sheathing is recommended for caterpillar trucks and unusual vehicles.
It is recommended that a piece of wood of suitable thickness should be provided under each crutch in order
to distribute the mass over the plate and the nearest stiffeners.
2.2 Hull structure
2.2.1 Framing
In general, car decks or platforms shall be longitudinally framed.
Where a transverse framing system is adopted, it shall be considered by the Society on a case-by-case basis.
2.3 Drainage of Ro-Ro cargo spaces, intended for the carriage of motor
vehicles with fuel in their tanks for their own propulsion
2.3.1 Scupper draining
Scuppers from cargo spaces intended for the carriage of motor vehicles with fuel in their tanks for their own
propulsion shall be led to machinery or other places where sources of ignition may be present.
3 Scantlings
3.1 Ro-Ro cargo spaces
3.1.1 Design loads
The wheeled loads induced by vehicles are defined in Pt.3 Ch.2 Sec.3 [6.6].
3.1.2 The scantlings of Ro-Ro cargo spaces shall be in compliance with Pt.5 Ch.4 Sec.1 [4].
3.2 Movable decks and inner ramps
3.2.1 The requirements applicable to movable decks and inner ramps are defined in Pt.3 Ch.5 Sec.6 [1].
Rules for classification: Inland navigation vessels — DNV-RU-INV Pt.6 Ch.4. Edition August 2021 Page 5
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DNV ASPart 6 Chapter 4 Section 1
3.3 External ramps
3.3.1 The requirements applicable to external ramps are defined in Pt.3 Ch.5 Sec.6 [2].
4 Electrical installations
4.1 Protective measures on car decks
4.1.1 Special category spaces: definition
Special category spaces are those enclosed vehicle spaces above and below the bulkhead deck, into and
from which vehicles can be driven and to which passengers have access. Special category spaces may be
accommodated on more than one deck.
4.1.2 Installations in special category spaces situated above the bulkhead deck
On any deck or platform, if fitted, on which vehicles are carried and on which explosive vapours might be
expected to accumulate, except platforms with openings of sufficient size permitting penetration of petrol
gases downwards, electrical equipment and cables shall be installed at least 450 mm above the deck or
platform.
Where the installation of electrical equipment and cables at least 450 mm above the deck or platform is
deemed necessary for the safe operation of the vessel, the electrical equipment shall be of a certified safe
type as stated in Pt.4 Ch.4 Sec.1 [1.4.6] and to have minimum explosion group IIA and temperature class
T3.
Electrical equipment shall be as stated in Pt.4 Ch.4 Sec.1 [1.4.7].
4.1.3 Installations in special category spaces situated below the bulkhead deck
An electrical equipment installed shall be as stated in Pt.4 Ch.4 Sec.1 [1.4.6] and to have minimum explosion
group IIA and temperature class T3.
4.1.4 Ventilation
Electrical equipment and cables in exhaust ventilation ducts shall be as stated in Pt.4 Ch.4 Sec.1 [1.4.6] and
to have minimum explosion group IIA and temperature class T3.
Rules for classification: Inland navigation vessels — DNV-RU-INV Pt.6 Ch.4. Edition August 2021 Page 6
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DNV ASCHANGES – HISTORIC
Part 6 Chapter 4 Changes – historic
December 2015 edition
This is a new document.
The rules enter into force 1 July 2016.
Rules for classification: Inland navigation vessels — DNV-RU-INV Pt.6 Ch.4. Edition August 2021 Page 7
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