Page 57 - Race

Variation in Wind Speed
 A change in the length of a leg is appropriate to ensure that time limits and/or target times are
met.
 Change in leg lengths should result in no less than 50% or no more than 150% of original leg
length.
 Do not make too many changes in length just to achieve target time.
 Changes in current may justify changes outside these same guidelines.

Changing the Next Leg of the Course for Wind Angle
This requires flag ‘C’ to be displayed with a repetitive
sound signal with one or both of the following:

 The magnetic bearing of the new position of the next
mark.

and/or

 A red rectangle when the new mark is to port of the
original mark.

and/or

 A green triangle when the new mark is to starboard
of the original mark.

Changing the Next Leg of the Course for Wind Speed
This requires flag ‘C’ to be displayed with a repetitive
sound signal with:

 A plus sign when the leg has been significantly
increased in length

or

 A minus sign when the leg has been significantly
decreased in length

Not infrequently the course needs to be changed for both wind angle and speed in which case the
above signals are appropriately combined. The new mark does not need to be in position when this
signal is made. Every effort should be made to maintain proper configuration of the course.

There are two methods used to achieve a change to the position of the next mark:

1. When resources are low, it may be necessary to lift the original mark and move it to a new
position. This can be a slow process and impossible if the tail end have yet to round the mark to
be moved but the leading boats are ready to sail the 'new' leg.

2. A new mark is laid in the new position and then the old mark is removed. To distinguish the new
mark from the old, the new mark is a different colour or has other distinguishing features. Tail-
enders can still sail to the 'old' mark whilst the leaders sail to the new one.

Version March 2018 55