National Iceboat Authority (NIA) Darling Mark Animated Course Guide

NEIYA site viewers may have already read this elsewhere originally posted on the Four Lakes Ice Yacht Club site http://iceboat.org or elsewhere. The animations are a great help in understanding the use of the Darling mark. The original article with larger pictures can be found here http://iceboat.org/animation.html

National Iceboat Authority Racing Rules Change Summary

By Tim McCormick
This is an excerpt. Read the entire summary here.

DARLING COURSE
The second course is the DARLING COURSE, which is a STANDARD COURSE modified with
the addition of two DARLING MARKS which must be left to PORT. This is named in honor of
John Darling who was the resident race committee and race starter in the New Jersey area
throughout the 1970’s and 1980’s. Mr. Darling was the first to use the DARLING MARK at the
leeward end of the course. The DARLING MARK serves several purposes:.

WINDWARD APPROACH

A. In larger fleets, there can be a tendency for some of the even side starters on
STARBOARD TACK to over stand the windward MARK. When they tack over to PORT
TACK, they are set up for a head on collision with yachts that have already rounded the
windward MARK. Therefore, near the windward MARK, the DARLING MARK creates
separation between ON-THE-WIND PORT TACK yachts and OFF-THE-WIND
STARBOARD TACK yachts to minimize collisions.

WINDWARD AFTER ROUNDING

B. After rounding the windward MARK, some yachts may desire to JIBE as soon as
possible. This can create head-on collision situations with STARBOARD TACK ONTHE-WIND
yachts that have understood the windward MARK. Therefore, near the
windward MARK, the DARLING MARK creates separation between ON-THE-WIND
STARBOARD TACK yachts and OFF-THE-WIND PORT TACK yachts to minimize
collisions.

LEEWARD MARK

C. Creates separation between a PORT TACK ON-THE-WIND yacht that has just rounded
the leeward MARK and STARBOARD TACK OFF-THE-WIND yachts approaching the
leeward MARK.
D. Creates separation between a STARBOARD TACK ON-THE-WIND yacht that has just
rounded the leeward MARK and subsequently TACKED and a PORT TACK OFF-THEWIND
yacht approaching the leeward MARK.

The bottom line is….the DARLING MARK is intended to create separation between yachts
which should minimize head-on collisions near the potentially congested areas around a MARK.
Some may claim that DARLING MARKS reduce the playing field and reduce the tactical
freedom of a race. I think they’re overstating it. With a 1 mile course and two DARLING
MARKS each placed 100 yards from their associated MARK, the “tactical area” is only reduced
by 11% (200yards x 1 mile/1760 yards = 0.11). Typically sailors don’t change tacks until
they’ve completed the MARK rounding and achieved full speed. That is likely 50 yards from a
MARK so the real effect on the “tactical area” is more like 5%. This is a minor issue compared
to the safety gained.

A key point regarding DARLING MARKS is the imaginary line between the MARK and its
accompanying DARLING MARK is considered part of the MARK. Therefore, if a yacht crosses
over this line, she will have fouled the MARK and be disqualified.

The disadvantage of the DARLING MARKS, of course, is the need for the Race Committee to
have additional equipment and the added labor of placing or moving the DARLING MARKS on
the course.

Animations by Dave Elsmo DN US5486
For original article and lager images http://iceboat.org/animation.html

 

1. STARTING PROCEDURE

TACKING AT THE START OF A RACE
One of the safety issues addressed is protecting the Race Committee immediately following the
start of a race. New rule IV.C.3 states: “After a yacht starts and until she rounds the windward
MARK for the first time, a yacht shall not pass between the center of the starting line (positions
1 and 2) and the leeward MARK.” This prevents yachts from tacking immediately after the start
of the race and endangering the Race Committee.
Note that the leeward mark, darling mark and the line between them are all considered part of the
mark- thus, a yacht must keep them both on the proper side on the first pass after starting (starboard
tack starters must keep them both on the starboard side and port tack starters must keep them both to port.)

2. WINDWARD MARK- APPROACH

In larger fleets, there can be a tendency for some of the even side starters on
STARBOARD TACK to over stand the windward MARK. When they tack over to PORT
TACK, they are set up for a head on collision with yachts that have already rounded the
windward MARK. Therefore, near the windward MARK, the DARLING MARK creates
separation between ON-THE-WIND PORT TACK yachts and OFF-THE-WIND
STARBOARD TACK yachts to minimize collisions.

3. WINDWARD MARK – AFTER ROUNDING

After rounding the windward MARK, some yachts may desire to JIBE as soon as
possible. This can create head-on collision situations with STARBOARD TACK ONTHE-WIND
yachts that have understood the windward MARK. Therefore, near the
windward MARK, the DARLING MARK creates separation between ON-THE-WIND
STARBOARD TACK yachts and OFF-THE-WIND PORT TACK yachts to minimize
collisions.

4. LEEWARD MARK – APPROACH

Creates separation between a PORT TACK ON-THE-WIND yacht that has just rounded
the leeward MARK and STARBOARD TACK OFF-THE-WIND yachts approaching the
leeward MARK.

5. LEEWARD MARK – AFTER ROUNDING

Creates separation between a STARBOARD TACK ON-THE-WIND yacht that has just
rounded the leeward MARK and subsequently TACKED and a PORT TACK OFF-THEWIND
yacht approaching the leeward MARK

6. FINISH – CORRECT PROCEDURE

7. FINISH – INCORRECT PROCEDURE

8. WINDWARD MARK RIGHT OF WAY

Another addition is Right-of-Way rule 8.a which states: “When yachts sailing ON-THE-WIND on
opposite tacks are approaching a MARK, the PORT TACK yacht shall keep clear of the
STARBOARD TACK yacht.” This new rule eliminates the previous confusion about the
governing rule when approaching the windward MARK: Did the STARBOARD TACK yacht
have rights over the PORT TACK yacht or was the PORT TACK yacht inside and therefore
require the STARBOARD TACK yacht to stay clear? This new rule clarifies that the PORT
TACK yacht shall keep clear.

9. WINDWARD MARK RIGHT OF WAY

Another addition is Right-of-Way rule 8.a which states: “When yachts sailing ON-THE-WIND on
opposite tacks are approaching a MARK, the PORT TACK yacht shall keep clear of the
STARBOARD TACK yacht.” This new rule eliminates the previous confusion about the
governing rule when approaching the windward MARK: Did the STARBOARD TACK yacht
have rights over the PORT TACK yacht or was the PORT TACK yacht inside and therefore
require the STARBOARD TACK yacht to stay clear? This new rule clarifies that the PORT
TACK yacht shall keep clear.

One response

  1. John yanusss

    Best animation program seen for sailing to get written or verbal rule to click without ever seeing a darling course. Would love to use animation program in our junior sailing program to get kids to have a better understanding of the rules.jsyhorizon@aol.com

    12/07/2015 at 5:47 am