Rule 18 Workshop

Август 6, 2022

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Rule 18 Workshop

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2. Workshop Contents Basic Framework of Part 2 Rules Rule 18 explained Rule 18 applied to situations
3. Basic Framework of Part 2 Rules For any pair of boats: One boat has to keep
4. What does Rule 18 Cover? Applies at marks and obstructions Designed to enable boats to go
5. When does Rule 18 Apply? Applies at a mark or obstruction: being left on the same
6. Rule 18.2: the Main Rule When overlapped, outside boat at a mark shall give inside boat
7. Rule 18.3: Special Tacking Rule If: boats A & B were on opposite tacks &: B
8. Rules 18.4 & 18.5: Other Provisions Gybing When inside overlapped r-o-w boat must gybe at mark
9. Rule 18 Summary Easy, isn’t it? 4 steps to heaven …. Does rule 18 apply? Which
10. Situation 1 When does rule 18 apply? Which boat is r-o-w? pos’n 1 pos’n 2 pos’n
11. Situation 2 When does rule 18 apply? Which boat is r-o-w? pos’n 1 pos’n 2 pos’n
12. Situation 3 When does rule 18 apply? Which boat is r-o-w? pos’n 1 pos’n 2 pos’n
13. Situation 4 When does rule 18 apply? Which boat is r-o-w? pos’n 1 pos’n 2 pos’n
14. Situation 5 When does rule 18 apply? Which boat is r-o-w? pos’n 1 pos’n 2 pos’n
15. Situation 6 When does rule 18 apply? Which boat is r-o-w? pos’n 1 pos’n 2 pos’n
16. Situation 7 Does rule 16 or 17 apply? Decision: When does rule 18 apply? Which boat
17. Situation 8 When does rule 18 apply? Which boat is r-o-w? pos’n 1 pos’n 2 pos’n
18. Situation 9 When does rule 18 apply? Which boat is r-o-w? pos’n 1 pos’n 2 pos’n
19. Situation 11 When does rule 18 apply? Which boat is r-o-w? pos’n 1 pos’n 2 pos’n
20. Situation 12 When does rule 18 apply? Which boat is r-o-w? pos’n 1 pos’n 2 pos’n
21. Guidelines for Deciding Situations The following situations are quite tricky - choose situations to suit audience
22. Situation 10 Does rule 16 or 17 apply? Decision: When does rule 18 apply? Which boat
23. Situation 14 When does rule 18 apply? Which boat is r-o-w? pos’n 1 pos’n 2 pos’n
24. Situation 13(a) When does rule 18 apply? Which boat (A v X) is r-o-w? pos’n 1
25. Situation 15(13 b & c) When does rule 18 apply? Which boat (A v X) is
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Workshop Contents
Basic Framework of Part 2 Rules
Rule 18 explained
Rule 18 applied

to situations

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Basic Framework of Part 2 Rules
For any pair of boats:
One boat

has to keep clear
&
the other is right-of-way boat

Boats may have additional obligations:
Rule 14: to avoid contact
Rule 15, 16 & 18: to give room
Rule 17: not to sail above / below proper course

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What does Rule 18 Cover?
Applies at marks and obstructions
Designed to enable

boats to go round marks & obstructions without risk of contact
Usually requires outside boat to give inside boat room to pass the mark or obstruction
Room here is room “on the inside” & includes room to tack or gybe when part of manoeuvre
Sometimes over-rides “normal” right of way rules

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When does Rule 18 Apply?
Applies at a mark or obstruction:
being left

on the same side
when boats are about to pass it
until they both have passed it

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Rule 18.2: the Main Rule
When overlapped, outside boat at a mark

shall give inside boat room except that:

if overlapped at 2 lengths, outside boat must give room even if overlap then broken
and must also keep clear if she becomes astern or inside
if one boat is clear ahead at 2 lengths, the other shall keep clear (and give room if later overlapped)
but if boat clear ahead tacks, this rule stops applying

and if right-of-way boat changes course to round a mark, rule 16 [altering course] does not apply

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Rule 18.3: Special Tacking Rule
If: boats A & B were on opposite

tacks
&: B completes a tack inside 2 lengths when A is fetching the mark

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Rules 18.4 & 18.5: Other Provisions
Gybing
When inside overlapped r-o-w boat must

gybe at mark to sail her proper course, she must do so close to mark

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Rule 18 Summary
Easy, isn’t it? 4 steps to heaven ….
Does rule

18 apply? Which paragraph?
Which boat has right-of-way?
as rule 18 sometimes over-rides normal r-o-w
Does outside boat have to give inside boat room?
Do other rules apply - 14, 15, 16, 17?
Now for the workshop exercises - pick to suit standard of audience!

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Situation 1
When does rule 18 apply?
Which boat is r-o-w?
pos’n 1
pos’n 2
pos’n

3
pos’n 4
Which boat has to give rule18 room?
Does rule 16 or 17 apply?
Decision:

Don’t tack
in my water!

1 - 3: 18.2(c)

X
X
X
A

Neither

16: A4

Penalise A: A4 rule 16

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Situation 2
When does rule 18 apply?
Which boat is r-o-w?
pos’n 1
pos’n 2
pos’n

3
pos’n 4
Which boat has to give rule18 room?
Does rule 16 or 17 apply?
Decision:

1 - 3: 18.2(c)

X
X
X
A

Neither

Penalise X: X4 rule 13

Don’t tack
in my water!

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Situation 3
When does rule 18 apply?
Which boat is r-o-w?
pos’n 1
pos’n 2
pos’n

3
pos’n 4
Which boat has to give rule18 room?
Does rule 16 or 17 apply?
Decision:

Don’t tack
in my water!

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Situation 4
When does rule 18 apply?
Which boat is r-o-w?
pos’n 1
pos’n 2
pos’n

3
Which boat has to give rule18 room?
Does rule 16 or 17 apply?
Decision:

Note: A’s tack does not break rule 13 nor 15

Protest!

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Situation 5
When does rule 18 apply?
Which boat is r-o-w?
pos’n 1
pos’n 2
pos’n

3
pos’n 4
pos’n 5
Which boat has to give rule18 room?
Does rule 16 or 17 apply?
Decision:

Note: A’s tack does not break rule 13 nor 15

Protest!

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Situation 6
When does rule 18 apply?
Which boat is r-o-w?
pos’n 1
pos’n 2
pos’n

3
pos’n 4
Which boat has to give rule18 room?
Does rule 16 or 17 apply?
Decision:

Protest!

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Situation 7
Does rule 16 or 17 apply?
Decision:
When does rule 18 apply?
Which

boat is r-o-w (A v X)?
pos’n 1
pos’n 2
pos’n 3
pos’n 4
pos’n 5
Which boat has to give rule18 room?

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Situation 8
When does rule 18 apply?
Which boat is r-o-w?
pos’n 1
pos’n 2
pos’n

3
Which boat has to give rule18 room?
Does rule 16 or 17 apply?
Decision:

Protest!

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Situation 9
When does rule 18 apply?
Which boat is r-o-w?
pos’n 1
pos’n 2
pos’n

3
pos’n 4
pos’n 5
Which boat has to give rule18 room?
Does rule 16 or 17 apply?
Decision:

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Situation 11
When does rule 18 apply?
Which boat is r-o-w?
pos’n 1
pos’n 2
pos’n

3
Which boat has to give rule18 room?
Does rule 16 or 17 apply?
Decision:

Boats are approaching the line to start

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Situation 12
When does rule 18 apply?
Which boat is r-o-w?
pos’n 1
pos’n 2
pos’n

3
Which boat has to give rule18 room?
Does rule 16 or 17 apply?
Decision:

A does not give X room, and X makes contact with B’s stern

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Guidelines for Deciding Situations
The following situations are quite tricky - choose

situations to suit audience standard
The situations are shown diagramatically only …
… therefore the information is incomplete & your decision may depend on other data (eg wind strength, type of boat) that you would ascertain at the hearing
While rule 14 may apply, do not include rule 14 in your consideration
“New math” - it’s not the answer that counts! (after Tom Lehrer)

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