Notes for the South West Yacht Time Correction System Form
These notes are designed to explain what the YTC Team are trying to achieve with the YTC Form and how you can help us to achieve it. All the information you provide on the form is used in the calculation of the basic YTC number and the more accurate the information you give us, the more accurate the resulting YTC number will be. In general, it is more helpful to the YTC Team to give as much information as possible. If you have any questions about the YTC number you are given, please contact the YTC team in writing, preferably by email to email@example.com, with your questions.
It would be very helpful if all the dimensions discussed below are stated in metric units, i.e. metres (m), square metres (m2) and kilograms (kg) as appropriate.
Basic Yacht Information - Yacht Name, Sail Number etc.
The important bit here is the type or design of the yacht. It is important to give us as much information as possible, especially the year of build and which mark it is: Mk I, Mk II etc. If you have an IRC number for the boat please state it and, if possible, upload a copy of the certificate as a PDF file when prompted to do so by the software.
Dimensions of Boat.
|LOA||Length overall of the hull ONLY, excluding bowsprit, pushpit, pulpit, & transom hung rudders.||metres|
|LWL||Length on the waterline. This may be given by manufacturers or may be measured.||metres|
|Beam||Measured at the widest part at deck level.||metres|
|Draft||Measured from the water line to the lowest point on the keel.||metres|
|Displacement||This is the weight of the boat dry, as it came out of the manufacturer's premises, with no fuel, water and no other gear.||kilograms|
The sail areas you declare should be as quoted by the sailmaker concerned, boat manufacturer or, ideally, they should be measured by a YTC sail measurer; the areas should be stated in square metres (m2). If you are in doubt you are encouraged to request that your sails be measured. It is better not to estimate the size of the sails, as in general a less favourable YTC number than you might prefer might be the result. Please declare the areas of the largest upwind sails you will use. Similarly, for the downwind sails, please declare the largest spinnaker or asymmetric sails you will use, the type of spinnaker and the sail area. Please upload a sailmaker's certificate, email or a YTC Sail Measurement certificate when prompted to do by the software. Also, please do not use the sail area data as given by www.sailboatdata.com. It is usually misleading and often wrong.
The keel type, engine & propeller configurations are used in the YTC calculation to calculate your YTC number. It is important to let us know whether your keel has a wing, bulb or flare, and the extent of it. Sketches or photographs of the keel will be helpful and can be uploaded when prompted to do so by the software.
A boat's YTC number is generated by the YTC team in good faith, using the data supplied, historical data and, where necessary, pertinent data from other sources. The YTC team attempts at all times to give an accurate and fair YTC number but the team cannot be held responsible or liable for any losses of any type, however incurred.