Program for Jervis Bay Sailing Club

Jump to Courses and Information
Please click 2022-2023 CALENDAR/PROGRAM for a copy of the Program in PDF.
Note: Please advise us of any changes in the program of events so that the program can be updated
For Latest Minutes Advantage Handicaps for Pointscore Races in PDF click HERE

Jervis Bay Sailing Club 2022-2023 Calendar/Program

Date	Event
4 Jun 2022	1st Frost Bite Race
2 Jul 2022	2nd Frostbite; AGM; Presentation
6 Aug 2022	3rd Frostbite
3 Sep 2022	Ist Warmup Race
17 Sep 2022	2nd Warmup Race
24 Sep 2022	3rd Warmup Race
1 Oct 2022	October Regatta; Spiral TT1
2 Oct 2022	October Regatta; Spiral TT1
8 Oct 2022	Sprints 1; GOF Heat 1 here
15 Oct 2022	Points 1
22 Oct 2022	Championship 1
29 Oct 2022	Sprints 2
5 Nov 2022	Points 2
12 Nov 2022	Championship 2; ACT Dinghy Championship
13 Nov 2022	ACT Dinghy Championship; GOF 2 @ IYClub
19 Nov 2022	NSW State Sailboard Championship
20 Nov 2022	NSW State Sailboard Championship
26 Nov 2022	Points 3; Spiral States, Port Kembla
27 Nov 2022	Spiral States, Port Kembla
3 Dec 2022	Sprints 3
4 Dec 2022	Nowra Marathon, be there!
10 Dec 2022	Points 4
17 Dec 2022	Championship 3
24 Dec 2022	No Race Christmas
31 Dec 2022	No Race New Year Day Crowds
7 Jan 2023	Points 5
14 Jan 2023	Sprints 4
21 Jan 2023	Points 6
28 Jan 2023	No Race, Aus Day + Spirals Nationals @ Sunshine, Lake Macquarie.
4 Feb 2023	Championship 4
11 Feb 2023	Points 7
18 Feb 2023	Sprints 5
25 Feb 2023	Points 8
4 Mar 2023	Championship 5
11 Mar 2023	No Race - Set Aside for Event Hosting or Catch Up Race
12 Mar 2023	No Race - Set Aside for Event Hosting
18 Mar 2023	Points 9
19 Mar 2023	Alternative Marathon Date @ Nowra
25 Mar 2023	Sprints 6
1 Apr 2023	Points 10
8 Apr 2023	No Race Easter
15 Apr 2023	Championship 6
22 Apr 2023	Points 11
25 Apr 2023	ANZAAC Day
29 Apr 2023	Sprints 7
6 May 2023	Points 12
13 May 2023	Championship 7
20 May 2023	Points 13
27 May 2023	Catch-up Day to complete series
3 Jun 2023	1st Frostbite Race
1 Jul 2023	2nd Frostbite
5 Aug 2023	3rd Frostbite; AGM Presentation
2 Sep 2023	4th Frostbite
16 Sep 2023	Ist Warmup Race
23 Sep 2023	2nd Warmup Race
30 Sep 2023	October Regatta; Spiral TT1
1 Oct 2023	October Regatta; Spiral TT1
2 Oct 2023	Labor Day Holiday

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Courses and Race Length Information

The Club runs three series throughout the season using various courses (see below):

Championship (scratch start).
Sprint (scratch start).
Pointscore (handicap start).

Shortcut for Courses / Times / Leg Lengths

Event	Course	Number of Races per day	Indicative Time (10-15 knots)	Indicative Leg length (10-15 knots)
Sprints	Triangle Sausage	4-6	20 minutes	550 m
Championship	Triangle Sausage Triangle	2	45 minutes	800 m
Pointscore	Triangle Sausage Triangle Sausage	1	90 minutes	1100 m

Common Courses - Olympic Triangle with Port Roundings (Red Flag) (as shown in diagram); Starboard roundings can be used (Green Flag)

The courses for the three events run by the club are: Sprints (scratch start / yardstick) - Aim for 4-6 races each Sprints Day, back-to-back
=> Indicative Race Duration 20 minutes (550 m leg lengths in around 10 knots)
=> Start-Triangle-Sausage-Finish

Championship (scratch start / yardstick) - Aim for two races on each Championship Day, back-to-back
=> Indicative Race Duration 45 minutes (800 m leg lengths in around 10 knots)
=> Start-Triangle-Sausage-Triangle-Finish

Pointscore (handicap start - minutes advantage)
=> Indicative Race Duration 90 minutes (1100 m leg lengths in around 10 knots)
=> Start-Triangle-Sausage-Triangle-Sausage-Finish
----------------------------------------------------

Indicative 60-60-60 Triangle leg lengths for race duration for various wind speeds

Note:
Yellow Marine Park buoys => 1380 m apart
Red Hazard Buoys => 800 m apart

Pointscore

Triangle-Sausage-Triangle-Sausage
wind range	5-8 knots	8-12 knots	12-15 Knots	15+ Knots
Leg length for 30 min Race (nm)	0.2	0.3	0.3	0.4
Leg length for 30 min Race (km)	0.4	0.5	0.6	0.6
Leg length for 45 min Race (nm)	0.3	0.3	0.4	0.5
Leg length for 45 min Race (km)	0.5	0.6	0.7	0.9
Leg length for 60 min Race (nm)	0.4	0.5	0.6	0.7
Leg length for 60 min Race (km)	0.7	0.9	1.1	1.3
Leg length for 90 min Race (nm)	0.5	0.6	0.8	1.0
Leg length for 90 min Race (km)	0.9	1.1	1.5	1.9
Leg length for 120 min Race (nm)	0.7	0.9	1.1	1.2
Leg length for 120 min Race (km)	1.3	1.7	2.0	2.2

Championship

Triangle-Sausage-Triangle
wind range	5-8 knots	8-12 knots	12-15 Knots	15+ Knots
Leg length for 30 min Race (nm)	0.3	0.3	0.4	0.5
Leg length for 30 min Race (km)	0.5	0.6	0.7	0.8
Leg length for 45 min Race (nm)	0.4	0.5	0.6	0.7
Leg length for 45 min Race (km)	0.6	0.8	1.2	1.3
Leg length for 60 min Race (nm)	0.5	0.6	0.8	0.9
Leg length for 60 min Race (km)	0.9	1.1	1.5	1.7
Leg length for 90 min Race (nm)	0.7	0.9	1.2	1.4
Leg length for 90 min Race (km)	1.3	1.7	2.4	2.6
Leg length for 120 min Race (nm)	0.9	1.1	1.4	1.6
Leg length for 120 min Race (km)	1.7	2.0	2.6	3.0

Sprints

Triangle + Sausage
wind range	5-8 knots	8-12 knots	12-15 Knots	15+ Knots
Leg length for 20 min Race (nm)	0.3	0.35	0.4	0.4
Leg length for 20 min Race (km)	0.5	0.55	0.7	0.75
Leg length for 30 min Race (nm)	0.4	0.5	0.6	0.6
Leg length for 30 min Race (km)	0.6	0.8	1.0	1.1
Leg length for 45 min Race (nm)	0.6	0.7	0.8	0.8
Leg length for 45 min Race (km)	1.0	1.2	1.4	1.5
Leg length for 60 min Race (nm)	0.7	0.9	1.1	1.2
Leg length for 60 min Race (km)	1.3	1.7	2.0	2.2
Leg length for 90 min Race (nm)	1.1	1.3	1.5	1.6
Leg length for 90 min Race (km)	2.0	2.4	2.8	3.0
Leg length for 120 min Race (nm)	1.4	1.8	2.2	2.4
Leg length for 120 min Race (km)	2.6	3.4	4.0	4.4

Laser Speeds for Upwind, Runs and Reaches under various wind strengths

Laser Radial
Wind Range	5 - 8 Knots		8 - 12 Knots		12 - 15 Knots		15+ Knots
Units	Min/Nm	Min/km	Min/Nm	Min/km	Min/Nm	Min/km	Min/Nm	Min/km
Upwind Speed	22	11.9	20	10.8	17	9.2	16	8.6
Run Speed	18	9.7	14	7.6	10	5.4	9	4.9
Reach Speed	13	7.0	10	5.4	8	4.3	7	3.8
Laser Full
Wind Range	5 - 8 Knots		8 - 12 Knots		12 - 15 Knots		15+ Knots
Units	Min/Nm	Min/km	Min/Nm	Min/km	Min/Nm	Min/km	Min/Nm	Min/km
Upwind Speed	20	10.8	19	10.3	16	8.6	15	8.1
Run Speed	17	9.2	12	6.5	10	5.4	9	4.9
Reach Speed	12	6.5	9	4.9	7	3.8	6	3.2

See this link for addition leg length guides for Regattas

REGATTA - Indicative Leg lengths for race duration under various wind speeds

Amendments to the Pointscore Handicap Systems

Note: For the Pointscore the slower yachts are given several minutes start ahead of the faster yachts ('Catch me if you can'). Ideally all yachts should finish very close together.

The handicaps are adjusted after each race according to the following scheme:
1st place => loss of 2 minutes
2nd place => loss of 1 minute
3rd place => no change - stay as you are
4th place and all other starters (including DNF) => plus 1 minute
All non-starters have no change to their handicaps, except when all the scores need to be adjusted to avoid negatives. For example, when the winner has a Minutes Advantage Handicap of 1 minute and would lose 2 minutes, to a -1 minute handicap for the first place, ALL handicaps are increased by 1 minute so that the winner's new handicap is 0 (zero).
Note: The committee and handicapper will make periodic adjustments to the system to keep it as fair and functional as possible, and to assign handicaps to new members and visitors.
See the latest Minutes Advantage Handicaps as PDF

Course Area Distance Guide (see attached map below)

1380 m between Yellow Marine Park buoys
800 m between two Red port buoys (Brolga and Point Buoys)
1580 m between Point Red Buoy to Yellow Marine Park buoys
1760 m from Red Brolga Buoy to Yellow Marine Park buoy A1
2090 m from Red Brolga Buoy to Red Rock
1086 m from Red Rock to Yellow Marine Park buoy A1

Incidentally => From the Red Point buoy to the top Yellow Marine Park buoy (A1) is NE and 1580 m in length, so setting bottom mark 200 m out from red buoy in that direction and setting the top mark after travelling 800 m towards the A1 Marine Park Buoy gives a great default set up for prevailing NE winds with an ideal leg length of about 800 m.

Note: Leg lengths can be set using the yellow GPS tool, or an app you install on your phone, or the Map Plotter, or by motoring at a constant speed or revs between the two red buoys and noting the time taken for this 800 m distance. Motor for the same time and speed to set the distance between the buoys for your course.

See the Map below for the distances between key markers in the bay

Download the map as a PDF Course Area Distance Guide

Map — Key Marker Lengths in Hare Bay for setting courses

Expected Race Times for Various Yardsticks

The table below shows the winning margin required by yachts faster than a Spiral (bigger yardsticks) for the yachts classes shown so that there is an all class Dead_heat finish on corrected time (after applying yardsticks).

For example, for a Spiral having an elapsed time of 24.8 minutes for a designated 20 minute race => their corrected time would be 20 minutes:

The margin for a Finn would be 2 minutes ahead i.e. finish time 22,8 minutes; corrected time 20 minutes)
The margin for an International Canoe would be 6 minutes ahead (i.e. finish time of 18.8 minutes )
The margin for an RS Aero 7 (+ Laser Full) would be 2.3 minutes ahead (i.e. finish time of 22.5 minutes )
etc.

It also shows wait time between back-to-back races.

		20 min race	45 min race	60 min race	90 min race
Class	yardstick	Winning Margin to dead-heat (mins)	Winning Margin to dead-heat (mins)	Winning Margin to dead-heat (mins)	Winning Margin to dead-heat (mins)
Int Canoe	93.5	6.1	13.7	18.3	27.5
Finn	112.0	2.4	5.4	7.2	10.8
Laser Full	114.0	2.0	4.5	6.0	9.0
Laser Radial	118.5	1.1	2.5	3.3	4.9
RS Aero 7	112.5	2.3	5.2	6.9	10.4
RS Aero 5	116.8	1.4	3.2	4.3	6.5
Spiral	124.0	0.0	0.0	0.0	0.0
Spiral Race Time		24.8 min	55.8 min	74.4 min	111.6 min

Interesting Yardstick Comparisons

The yardsticks and times shown below provide some interesting match-ups.
The Aero options are vastly different 5 to 9 => 116.8 to 109.3, spans Laser Radial to Taser. With such a light-weight hull, performance will be markedly affected by skipper weight.

Laser 4.7 similar to Spiral
Laser Radial similar to Aero 5, which is a bit faster
Aero 7 faster than Laser Full, and very similar to Finn
Aero 9 similar to Taser, Aero 9 is super fast.

Class	Yardstick	Expected time for 90 min race	Minutes advantage so all finish in dead-heat
Laser 4.7	125	72	18
Spiral	124	73	17
Laser Radial	118.5	76	14
Aero 5	116.8	77	13
Laser Full	114	79	11
Aero 7	112.5	80	10
Finn	112	80	10
Aero 9	109.3	82	8
Taser	108	83	7