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BS EN ISO 12217-2:2017:2018 Edition

BS EN ISO 12217-2:2017:2018 Edition

$215.11

Small craft. Stability and buoyancy assessment and categorization – Sailing boats of hull length greater than or equal to 6 m

Published By Publication Date Number of Pages
BSI 2018 104
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This part of ISO 12217 specifies methods for evaluating the stability and buoyancy of intact (i.e. undamaged) boats. The flotation characteristics of boats susceptible to swamping are also encompassed.

The evaluation of stability and buoyancy properties using this part of ISO 12217 will enable the boat to be assigned to a design category (A, B, C or D) appropriate to its design and maximum load.

This part of ISO 12217 is principally applicable to boats propelled primarily by sail (even if fitted with an auxiliary engine) of 6 m up to and including 24 m hull length. However, it can also be applied to boats less than 6 m if they are habitable multihulls or may be applied if they do not attain the desired design category specified in ISO 12217-3 and they are decked and have quick-draining recesses which comply with ISO 11812.

In relation to habitable multihulls, this part of ISO 12217 includes assessment of susceptibility to inversion, definition of viable means of escape and requirements for inverted flotation.

This part of ISO 12217 excludes:

  • inflatable and rigid-inflatable boats covered by ISO 6185, except for references made in ISO 6185 to specific clauses of ISO 12217;

  • gondolas and pedalos;;

  • surfboards including sailing surfboards; and;

  • hydrofoils and foil stabilized boats when not operating in the displacement mode.;

NOTE Displacement mode means that the boat is only supported by hydrostatic forces.

It does not include or evaluate the effects on stability of towing, fishing, dredging or lifting operations, which need to be separately considered if appropriate.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA (informative)Relationship between this European Standard and the essential requirements of Directive 2013/53/EU aimed to be covered
9 Foreword
11 Introduction
13 1 Scope
2 Normative references
14 3 Terms and definitions
3.1 Primary
16 3.2 Hazards
3.3 Downflooding
17 3.4 Dimensions, areas and angles
18 3.5 Condition, mass and volume
21 3.6 Other terms and definitions
24 4 Symbols
25 5 Procedure
5.1 Maximum load
5.2 Sailing or non-sailing
26 5.3 Tests, calculations and requirements to be applied
5.4 Variation in input parameters
6 Requirements for monohull boats
6.1 Requirements to be applied
27 6.2 Downflooding
6.2.1 Downflooding openings
30 6.2.2 Downflooding height
31 6.2.3 Downflooding angle
6.3 Recess size
6.3.1 Application
32 6.3.2 Simplified methods
34 6.3.3 Direct calculation method
6.4 Minimum righting energy
6.5 Angle of vanishing stability
35 6.5.1 Normal requirement
6.5.2 Alternative requirement for design category B
36 6.6 Stability index (STIX)
6.6.1 Method
37 6.6.2 Dynamic stability factor (FDS)
6.6.3 Inversion recovery factor (FIR)
6.6.4 Knockdown recovery factor (FKR)
38 6.6.5 Displacement-length factor (FDL)
6.6.6 Beam-displacement factor (FBD)
6.6.7 Wind moment factor (FWM)
39 6.6.8 Downflooding factor (FDF)
6.6.9 Calculation of the stability index (STIX)
40 6.7 Knockdown-recovery test
41 6.8 Wind stiffness test
6.8.1 General
6.8.2 Practical test
42 6.8.3 Compliance by calculation
6.8.4 Requirements
43 6.9 Flotation requirements
44 6.10 Capsize-recovery test
45 6.11 Detection and removal of water
46 7 Requirements for catamarans, trimarans and form-stable monohulls
7.1 Requirements to be applied
7.2 Downflooding openings
7.3 Downflooding height
7.4 Recess size
47 7.5 Stability information
48 7.6 Safety signs
49 7.7 Bare poles factor
7.8 Rolling in breaking waves
7.9 Pitchpoling
50 7.10 Diagonal stability
7.11 Habitable multihull boats
51 7.12 Buoyancy when inverted
52 7.13 Escape after inversion
53 8 Safety signs
54 9 Application
9.1 Deciding the design category
9.2 Meaning of the design categories
56 Annex A (normative) Full method for required downflooding height
59 Annex B (normative) Methods for calculating downflooding angle
62 Annex C (normative) Determining the curve of righting moments
65 Annex D (normative) Method for calculating reserve of buoyancy after inversion or swamping
67 Annex E (normative) Flotation material and elements
69 Annex F (normative) Information for ownerā€™s manual
73 Annex G (normative) Determination of safe wind speed information
76 Annex H (normative) Determination of longitudinal righting characteristics
79 Annex I (informative) Summary of requirements
82 Annex J (informative) Worksheets
101 Annex K (informative) Illustration of recess retention level
102 Bibliography

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BS EN ISO 12217-2:2017
$215.11