HULL ARRANGEMENT,
STABILITY AND SYSTEMS
FOR SHIPS LESS THAN
500
GT
NR566 - JULY 2022
NR566 DT R03 JULY 2022
RULE NOTE
BUREAU VERITAS MARINE & OFFSHORE
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BUREAU VERITAS
RULES, RULE NOTES
AND GUIDANCE NOTES
These rules are provided within the scope of the Bureau Veritas Marine &
Offshore General Conditions, enclosed at the end of Part A of NR467, Rules
for the Classification of Steel Ships. The current version of these General
Conditions is available at the Bureau Veritas Marine & Offshore website.
The PDF electronic version of this document available at the Bureau Veritas
Marine & Offshore website https://marine-offshore.bureauveritas.com/
is the official version and shall prevail if there are any inconsistencies
between the PDF version and any other available version
.
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Hull Arrangement, Stability and Systems for Ships less than 500 GT
Rule Note NR566
Table of Content
July 2022
2
Chapter 1 General Arrangement Design, Stability, Hull
Integrity
Section 1 General Requirements
1 General 17
1.1 Application
1.2 References to other rules
1.3 Symbols
1.4 Definitions
1.5 Dangerous goods
Section 2 General Arrangement Design
1 Subdivision arrangement 22
1.1 Number of watertight bulkheads
1.2 Collision bulkhead
1.3 Height of transverse watertight bulkheads
1.4 Openings in watertight bulkheads and decks
2 Compartment arrangement 23
2.1 Cofferdams
2.2 Double bottoms
2.3 Compartments forward of the collision bulkhead
2.4 Shaft tunnels
3 Access arrangement 24
3.1 General
4 Helicopter facilities 24
4.1 General
5 Accommodation 24
5.1 Seating of crew boats
6 Crew protection 24
6.1 Bulwarks and guard rails
Section 3 Stability
1 General 25
1.1 Application
1.2 Relaxation
2 Intact stability 25
2.1 Requirements
3 Damage stability 25
3.1 General
3.2 Damage dimensions
3.3 Progressive flooding
3.4 Minor damage
3.5 Permeabilities
3.6 Survival requirements
3.7 Damage stability criteria
3.8 Heeling moments
Section 4 Hull Integrity
1 General 28
1.1 Application
Hull Arrangement, Stability and Systems for Ships less than 500 GT
Rule Note NR566
Table of Content
July 2022
3
2 External openings 28
2.1 General
2.2 Bow doors, inner doors, side doors and stern doors
3 Sidescuttles, windows and skylights 28
3.1 General
3.2 Opening arrangement
3.3 Glasses
3.4 Deadlight arrangement
4 Discharges 30
4.1 Arrangement of discharges
4.2 Arrangement of garbage chutes
4.3 Scantlings of garbage chutes
4.4 Scuppers
4.5 Pipe discharges
4.6 Specific arrangements
4.7 Summary table of scupper and overboard discharge arrangements
5 Machinery space openings 32
5.1 Closing devices
5.2 Coamings
6 Companionway 33
6.1 General
6.2 Scantlings
6.3 Closing devices
7 Hatches 34
7.1 Hatchways
8 Ventilation openings 34
8.1 Ventilation openings
8.2 Coamings
9 Air pipes 35
9.1 General
10 Tank cleaning openings 36
10.1 General
11 Freeing ports 36
11.1 General
11.2 Ships of less than 24 m in length
12 Minimum bow height 36
12.1 General
Chapter 2 Machinery
Section 1 General Requirements and Application
1 General 40
1.1 Application
1.2 Documentation to be submitted
1.3 Definitions
2 Design and construction 40
2.1 General
2.2 Materials, welding and testing
2.3 Vibrations
2.4 Operation in inclined position