8/10/2019 ISO 12217-1 Calculation Worksheet

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Design:

Summary of design category definitions

Wave height up toTypical Beaufort wind force

Calculation wind speed (m/s)

Design Category Intended: Multihull

Symbo Unit

Length of hull as in ISO 8666 L H m

Beam of hull BH m

Windage area A LV m2

Mass:

Maximum total load:

Desired Crew Limit CL -

Desired Passenger Limit PL -

Total person aboard

Mass of:

desired Crew Limit at 75kg each kg

provisions + personal effects kg

desired Passenger Limit at 75kg each kg

passenger effects kg

fresh water kg

fuel oil kg

other liquid carried aboard kg

stores, spare gear and cargo (if any) kg

optional equipment and fittings kg

not included in basic outfit

inflatable liferaft kg

other small boats carried aboard kg

margin for future additions kg

Maximum total load = sum of above masses mMTL kg

Light craft condition mass mLCC kg

Loaded displacement mass = mLCC+ mMTL mLDC kg

Mass of:

minimum number of crew kg

essential safety equipment [ (L H- 2.5)2

] kg

non-consumable stores and equipment normally aboard kg

water ballast in tanks which are notified in the owner's

manual to be filled whenever the boat is afloat

inflatable liferaft kg

Load to be included in Minimum Operating Condition mL kg

Light craft condition mass mLCC

kg

Mass in the Minimum Operating Condition = mLCC+ mL mMOC kg

mLDC/mMOC 1.72 > 1.15

ISO 12217-1:2002 E) NON-SAILING BOATS OF LENGTH GREATER THAN OR EQUAL TO 6m

CALCULATION WORKSHEET No. 1

Item

The calculation of Heel Due to

Wind Action is not required.

Remarksalue

11.400

2.740

14.895

D

-Ratio A LV/(L HBH)

4

28

100.00

2100.00

280.00

0.00

2390.00

0.477 1.0

779.21

A

approx. 7m significant 4m significant

kg

280.00

3060.00

2390.00

5450.00

79.21

up to 6 up to 4

3169.21

B C

32

300.00

100.00

28 21 17 13

Design category

600

2m significant 0.5m significantup to 10 up to 8

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8/10/2019 ISO 12217-1 Calculation Worksheet

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Design : 39ft. G.R.P. Passenger Boat - TW1

Offset-Load Test:

Calculation of heeling moment for boats with not more than one level:

Symbol Unit

Plan area for movement of crew A C m2

Crew density = CL/ 4A C CD m-2

Maximum breadth of crew area BC m

Crew heeling if CD 0.5 = 314 ACBCmoment if CD < 0.5 = 314 CLBC (1-CD)

Compliance with requirement :

Symbol Unit

Equivalent moment in kg.m for test = MC/9.806 kg.m

Angle of heel with MCapplied 0 degrees Refer Diagram

Max. an le of heel allowed = 10 + 24-L3/600 0 R degrees

PASS / FAIL ?

The least height from the waterline to the downflooding openings during Offset-Load Test

Least height to waterline (m)

Downflooding:

Downflooding Angle:

Symbol Unit

Required value: (where 0= angle from Offset-Load test)

Category A = larger of (0+ 25)or 30 D(R) degrees

Category B = larger of (0+ 15)or 25 D(R) degrees

Category C = larger of (0+ 5)or 20 D(R) degrees

Category D = 0 D(R) degrees

Area of openings permitted to be submerged = 50L H2 m2

Actual downflooding Angle:

at mass = mMOC D degrees

if ratio of mLDC/mMOC> 1.15 then at mass = mLDC D degrees Refer to GZ Curve

PASS / FAIL ?

Downflooding Height:

Category A

Category B

Category C

Category D

Actual Downflooding Height, hD

ISO 12217-1:2002(E) NON-SAILING BOATS OF LENGTH GREATER THAN OR EQUAL TO 6m

CALCULATION WORKSHEET No. 2

Cat. C > 0.11 H

Cat. D > 0.07 H

Value Remarks

957.37

12.83

13.3

PASS

0.371 0.236 0.454 Refer Diagram

Category C

N.m 9387.97

Item Value Remarks

30.00

25.00

20.00

Item Value Remarks

13.59

0.589

2.200

MC

1.080 0.81

41.26

PASS

1.72

6498.00

= basic x 0.75

0.54

Requirement

Design category given :

Item Value Remarks

0.53

0.54

0.30

0.957 t/m

Requirement

Required

Downflood

Height, hD(R)

(m)

Basic requirement

Basic

Reduced value for small

openings

0.725

0.725

0.700

0.400

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