OFFSHORE RACING CONGRESS World Leader in Rating Technology Secretariat: UK Office: c/o Vivian Rodriguez Marlborough House Casella Postale 21 Victoria Road South, Chelmsford 07026 Porto Rotondo (OT), Italy Essex CM1 1LN, U.K. Tel. & Fax: +39 0789 398034 Tel: +44 1245 495 111 secretariat@orc.org Fax: +44 1245 494 771 www.orc.org ORC SY MEASUREMENT GUIDANCE Release 1.0 21th October 2015 1. INTRODUCTION This paper must be taken as guidance for the process of boat measurement to allow for the issuance of an ORC SY certificate. These measurement procedures will be included in the ORC SY rule to be issued soon. This protocol tries to address issues related to the measurement of large SuperYachts: A. The need of an accurate DSPL measurement (as close as possible to racing trim) B. The need for an accurate stability measurement C. Any request to include in the racing trim the cruising gear kept on board during SuperYacht races. D. The possibility to make measurement controls during the racing events. This protocol could be amended during the season to address possible issues which may arise when measuring SuperYachts. 2. FLOATATION AND DSPL MEASUREMENT The boats should be rated in their RACING TRIM, hence starting from LIGHTSHIP TRIM (empty), the following additions will be made: 1. Racing gear 2. Crew 3. Sails 4. Liquids 5. Anchors and chain 6. All the items not removed during the race (that must be included in an inventory list to be kept on board while racing Crew and sails are computed by default by the VPP, and liquids and anchors are declared by the captains before the races. So the issue is to evaluate racing gear and all items not removed during the races. To solve this issue and to avoid any complaints from captains and crews, ORC Measurers will measure the floatation of boats in conditions as close as possible to their RACING TRIM. This would also enable captains not to unload everything before their floatation measurement. Items such as drinkable water, spirits, clothes, and personal items should be unloaded if possible during measurement. A detailed inventory list of what is on board when measuring MUST be prepared by the measurer, including the weight, LCG and VCG of each item. (Attached is a suggested method using an Excel Spreadsheet and a plot).
The captain should declare which items will be kept on board during racing, and which items are removed, with a final inventory list to be produced and kept on board, together with the certificate (this inventory list will be checked during the races). The racing trim will be then computed from measured displacement, deducting the weight that will be declared NOT ON BOARD WHILE RACING (the lesser of the above weights the better will be) adding: a) The declared liquids on board b) The declared anchors and chain c) The sails (by default if not on board during measurement) d) The crew (by default) The RACING TRIM could be deduced in two ways (listed in decreasing level of accuracy): OPTION 1 (compulsory when freeboards are measured) i. OFFSET FILE SCANNED with laser machine (Total Station or 3D photogrammetry scanner) made with an official measurer appointed by ORC ii. iii. FREEBOARD MEASUREMENT in the water made with an official measurer appointed by ORC Inventory list from the measurer endorsed by the captain with weights to deduct and weights to be kept on board It will be necessary before measuring the floatations that captains should prepare the boats as close as possible (apart from liquids) to racing condition by unloading all the weights that won t be on board during the race. It is important to make an accurate INVENTORY LIST with weight to deduct and weights to be kept on board. OPTION 2 (used for almost all boats during 2015 season and with no need of measuring freeboards) i. DESIGNER OFFSET FILE or 3D HULL FILE (IGES or STP or other tridimensional file) provided by designer or shipyard ii. Official STABILITY BOOKLET iii. iv. LIGHTSHIP DSPL FROM STABILITY BOOKLET Addition of RACING GEAR by default (no inventory list). Default values will be evaluated in a way to not unduly favor boats not completely measured WARNING: The default evaluation of RACING GEAR weight to be added to lightship DSPL will be underestimated because some boats remove a lot of weight before racing. 3. STABILITY MEASUREMENT There are two different options to derive boat s stability (hence VCG and RM): a) Measuring stability FROM INCLINING using the boom as extension arm (one degree of heel minimum should be reached). b) Deriving Stability from the STABILITY BOOKLET 4. SAIL MEASUREMENTS There could be two different methods for sail measurements: SAILS MEASURED BY MEASURERS (WITH STAMP ON THE HEAD). SAILS MEASURED BY SAILMAKERS (WITH OFFICIAL REPORT) A sail measurer s declaration will be considered in special cases.
5. RIG MEASUREMENT The rig measurement could be obtained by: RIG MEASURED BY MEASURERS with an official report RIG FROM SAILPLAN DRAWING 6. PROPS The propeller installation could be derived in two ways FULLY MEASURED ONLY PRD declared and PIPA computed by default 7. TANKS Tank volumes and positions will be derived from the following documentation: STABILITY BOOKLET DRAWING WITH CAPACITIES/LCG/VCG 8. SUPERSTRUCTURE GEOMETRY The ORC Rating Office will derive superstructure geometry areas from SAILPLAN and DECKPLAN drawings. 9. CENTERBOARDS The ORC Rating Office will derive centerboard geometry from CENTERBOARD drawings. 10. DECLARED VALUES This is a list of declared values that Captains/owners/designers/Shipyards should declare: DOME DIMENSIONS SAILS IN THE INVENTORY COUNT FURLED MAIN/JIB SAILS ON A FURLER UPWIND FURLING UPWIND SAILS WHEN TACKING RIG CONFIG (Sloop / Ketch / Schooner etc.) CONSTRUCTION MATERIALS TANK LEVELS ANCHORS WINCH CHARACTERISTICS (KW and SPEED) 11. DRAWINGS AND DOCUMENTATION TO BE PROVIDED The following drawings (in AUTOCAD format) and documentation should be provided: TANKS PLAN SAIL PLAN DECK PLAN WITH SIDE AND FRONTAL LINES OF THE COACHROOF CENTERBOARD PLAN STABILITY BOOKLET 12. CONTROLS DURING RACES Floatation controls during races are tricky, yet could be performed with loose mooring lines in calm waters and making a clear photo of the boat conditions during measurement to be compared with certificate conditions. There are two different ways of checking floatation: If the certificate has been issued with freeboard measurements by checking the same freeboards in the same position
If no floatation has been performed before, it is necessary that immersion marks should be present on the hull (not many boats have these). With the Stability Booklet it is easy to check the displacement The only controls that could be performed during races without too many problems are the checking of inventory lists, liquids, etc.
13. INVENTORY LIST EXAMPLE Item Quant Kgs total X Z Forward Cabin Stb 0 Bath toiletries 1 20 20 5.55 1 personal clothes 2 50 100 6.50 1 Forward Cabin Port Bath toiletries 1 20 20 5.55 1 personal clothes 2 50 100 6.50 1 Crew Cabin hallway Toiletries+various 1 50 50 9.50 0 Floor, food spares 1 200 200 9.50 0 Captains Cabin personal items 1 100 100 11.50 0.5 Toiletries 1 10 10 11.50 0.5 Starboard Aft Cabin personal clothes 2 50 100 11.50 0.5 Toiletries 2 10 20 11.50 0.5 Mid ship bilge 1 30 30 11.50 0.3 Mid ship bilge 1 20 20 12.50 0.3 Mid ship drawers 1 20 20 13.00 0.3 Crew refrigerator 1 50 50 13.50 0 Books/Manuals/etc 1 100 100 13.50 0.5 Fridge 1 200 200 13.50 0.5 Cutlery/Drawers 3 10 30 15.00 0 Max Galley 1 20 20 15.00 0.5 bilge 1 20 20 14.50 0.5 Galley 1 1 260 260 14.50 0.5 Main fridge 1 200 200 17.50 0.5 Main fridge 1 150 150 17.50 0.5 Laundry 1 120 120 16.50 0 Galley bilge (food) 1 200 200 16.50 1 Spare mast jack 1 80 80 16.50 80 Medical items 1 30 30 17.50 1 Liquor botles 1 50 50 17.50 0 Wetgear 1 150 150 18.50 1 Glasswear 1 90 90 18.50 1 Guest TV room emergency pump 1 340 340 17.50 1 Engineering supplies 1 500 500 17.50 1 Guest Toilet 1 30 30 0.00 0 Saloon Books/Publications/Wine/Cutlery/Glasses/ 1 700 700 21.50 2 Alcohol Guest Starboard Forward Cabin Toiletries 1 20 20 27.50 0
Life jackets 1 80 80 27.50 0.5 Guest Port Forward Cabin Toiletries 1 20 20 27.50 0 Spare bedding 1 20 20 29.50 0 Spare bedding 1 100 100 29.50 0.5 Guest Starboard Cabin Aft 1 20 20 31.50 0.5 Toiletries 1 20 20 31.50 0.5 Master Cabin 1 20 20 35.00 0.5 Owner clothes 1 200 200 37.00 0 Under floor (Race gear) 1 200 200 38.00 0.5 Trophies 1 20 20 37.00 0 Captain s office 1 120 120 19.00 1 Engine room 1 500 500 22.00 0 Deck Anchor 0 Chain 0 Foot locker Lines/Sheets/Fenders/Mooring lines/blocks 1 700 700 5.00 1 Starboard Sails locker 1 200 200 12.00 1.5 Pit winch locker 1 100 100 16.00 2 Cleaning locker 1 0 Crew tender 1 251 251 20.50 1.5 Deck consumables 1 192 192 20.50 1.5 Deck Saloon Fire fittings 1 200 200 33.50 2 emergency tools 1 50 50 33.50 2 Deck saloon fridges 1 20 20 22.00 2 Lazarette Spares Oil Tender 1 300 300 41.00 0.5 Spares engineering 1 600 600 42.50 0.5 Drings (???) 1 150 150 42.50 0.5 Gym equipment 1 150 150 42.50 0.5 Water sports 1 500 500 42.50 0.5 Engine crew tender 1 100 100 42.50 0.5 Spares covers 1 100 100 42.50 0.5 Deck furniture 1 100 100 42.50 0.5 Deck tools 1 200 200 42.50 0.5 Liquids 0 Lube Oil 1 612 Sludge 1 195 Hydraulic spares 1 541 Main Hydraulics 1 490 Fuel Wing 1 2200 Fuel Bottom 1 2900 Fuel Day 1 433
Fuel Bottom 1 2600 Fuel wing Starboard 1 2300 Fresh water Port 1 1933 Fresh water Starboard 1 1895 Grey water Port 1 125 Grey water Starboard 1 1350 10 people on board 1 750 0 TOTAL 9363 weights CG 23.658 1.367
14. INVENTORY LIST PLOTS