Saturday 19 March 2011

Fact Finding Friday Animation; Vol 11.4

A day (and then some) late for Fact Finding Friday Animation, but here is instalment 4 at last.
You'll have to deal with Lasers this time. Yellow and Blue are approaching a windward mark to be left to starboard.



Please write down the Facts Found, a Conclusion (with rules applicable) and your Decision. You need to consider RRS 18.3 since one of them is subject to rule 13 in the zone....
Good luck.

As always I'll refrain from publishing your comments until the next one, so everybody has the same information.
Ooh, and also, the goal is not to have a 'right' answer, but to write facts that are supported by the animation, conclusions that are supported by the facts and a correct decision based on those conclusions.
J.

13 comments:

  1. Facts found.

    Blue, sailing on port on the port layline, is approaching the weather mark to be rounded to starboard.

    Yellow also close hauled on port is about 4 boat lengths to leeward of Blue and three boat lengths ahead.

    As Yellow nears the zone, she luffs up and completes her tack to stbd inside the zone, about two boat lengths below the stbd lay line.

    Blue enters the zone as Yellow completes her tack in the zone.

    As Yellow, now on stbd converges with Blue on port, Blue luffs up for two boat lengths staying clear of Yellow.

    While Blue is head to wind, Yellow tacks to port on the port lay line and rounds the mark. As Yellow completes her tack to port, Blue bares off and rounds the mark to weather and behind Yellow.

    Conclusions.

    There are two instances where Yellow tacks in the zone. When Yellow first tacks, both Blue and Yellow are approaching the mark on the same tack, and so R 18.3.a does not apply. Once Yellow tacks to stbd, they are now on opposite tacks and so R 18 is turned off and we have a port/stbd.

    Blue on port, luffs to stay clear of Yellow on stbd. Blue could tack to stbd to avoid Yellow, but delays tacking and sails head to wind for two boat lengths and is able to fall back on to port as Yellow tacks to port.

    Yellow in tacking to port does not obstruct Blue who is staying clear.

    After the tack to port, Blue is now subject to R18.3.a (opposite tack, tacking in the zone), but she did not force Blue above close hauled as a result of the tack, as Blue was already above close hauled.

    Decision and grounds.

    Protest (was there one?) dismissed.

    Blue did not break R 13 each time that she tacked. Blue did not break R 18.3.a in that she did not force Yellow above close hauled after tacking to port in the zone. Blue already was above close hauled before Yellow tacked in the zone. Blue did not break R 10.

    John

    ReplyDelete
  2. Facts Found

    1. B and Y are close hauled on port tack, B, just above the layline to round mark W to starboard and clear astern of Y, who is four boatlengths to leeward.

    2. Y tacks, passing head to wind just before she reaches the zone, reaching a close hauled course on starboard about two boatlengths away from B.

    3. B luffs to, but not past head to wind to keep clear of Y, leaving about one and a half boatlengths between herself and the mark.

    4. When she is about 1 boatlength from the mark, Y tacks inside B, and B bears away, and falls clear astern of Y.

    Conclusion

    A. When Y tacks for the second time, she is subject to rule 13 in the zone while B is fetching the mark. Before her tack, Y caused B to sail above close hauled to keep clear of her, but Y does not cause B to sail above close hauled by her tack. Y does not break rule 18.3(a).

    Decision

    Protest dismissed.

    ReplyDelete
  3. It is fleet-race, OK? And IMO what happening up to pos.#4 is not important...then:
    Facts found
    1.Two boats B on port and Y on starboard have been onto collision course and approached windward mark (pos.#4).
    Both boats were in the zone and the B was fetching the mark.
    2.When distance between the boats was near one BL the B luffing to HTW for keep clear of the Y.
    The B doesn’t pass HTW.
    3.The Y tacking on port and bearing away for passing the mark.
    4. The B began bearing away to close-hauled at once when the Y pass HTW.
    5. No a contact.
    Conclusions
    While the boats were on opposite tacks has applicable the rule 10 and the B not broke this rule.
    When Y has pass HTW, began to be applied the rules 13 and 18.3.
    While the Y bear away from HTW to close-hauled she does not compel the B avoid her thus rule 13 is not broke.
    Also after pass HTW the Y does not compel the B to sail above close-hauled to avoid her (the B could sail close-hauled at once after the Y pass HTW) thus the Y not broke rule 18.3.
    Rules applicable: 10, 13, 18.3, 11, 12.
    Decision
    There were not broken any the rules.

    ReplyDelete
  4. Facts Found:

    1. At positions 1 and 2 Blue and Yellow, both on port tack, are approaching the windward mark to be left to starboard. Blue is one half-boat length above the port tack layline and is fetching the mark.
    2. At position 3, Yellow tacks to starboard and completes her tack inside the zone.
    3. After completing her tack in the zone Blue and Yellow are approaching the mark on opposite tacks.
    4. At position 4, 5, and 6 Blue, on port, luffs head to wind to keep clear of Yellow, on starboard.
    5. At positions 6-7 Yellow tacks to port and establishes an inside overlap on Blue at the mark. Yellow rounds the mark inside of Blue while Blue keeps clear.
    6. At positions 3-4 and 6-7 Yellow, while tacking, keeps clear of Blue until reaching a close hauled course.
    7. At positions 6-7 Blue falls off to a close hauled course

    Conclusions:

    1. At positions 4 and 7 Yellow keeps clear of Blue while tacking. Yellow does not break rule 13.
    2. At positions 4, 5, and 6 Blue, on port, luffs to keep clear of Yellow, on starboard. Blue does not break rule 10.
    3. At positions 7 and 8 Blue keeps clear of Yellow and does not break rule 11 or rule 12.
    4. Rule 18.3 does not apply to Yellow after completing her tack in the zone at position 4 as Blue and Yellow were approaching the mark on the same tack.
    5. When Yellow tacks to port in the zone at positions 6-7 Yellow is subject to rule 13 in the zone and thereafter rule 18.3 applies and rule 18.2 does not.
    6. After position 6 Yellow, subject to rule 13 in the zone while rule 18.3 applies, does not cause Blue to sail above close hauled. Yellow does not break rule 18.3(a).

    Decision:

    Neither boat breaks a rule.

    ReplyDelete
  5. Facts found:

    On a beat to windward to a mark to be left to starboard, Blue, on port tack, was fetching the mark. Yellow, clear ahead, was 4 boatlengths below the lay line.

    Yellow entered the zone first and completed a tack on to starboard in the zone. Yellow was then on a collision course with Blue and two boat-lengths away. Blue immediately luffed head to wind. If Blue had completed her tack she would have been half a boat length to leeward of Yellow. However, at this moment, Yellow luffed and tacked, rounding the mark. Blue followed Yellow, remaining at all times at about one boat length to windward then astern of Yellow.

    Conclusion:

    When Yellow tacked on to starboard rule 18 ceased to apply. Yellow acquired right of way (rule 15) and gave room to Blue to keep clear. Yellow,right of way boat, was able to sail her course with no need to take avoiding action. Blue kept clear throughout.

    Decision:

    No rule broken


    Gordon

    PS The key to this decision is finding that Blue could have kept clear by completing a tack if Yellow had stood on on starboard. There may be some discussion as to whether this is a deduced fact or a conclusion.

    ReplyDelete
  6. Jos,

    Y enters the zone first while tacking, while the two boats are approaching each other within the zone Rule 10 governs and B is the keep clear boat. Rule 18 does not apply due to 18.1.a and 18.1.b. B starts to tack to keep clear of Y and keeps clear under Rule 13. Y starts to tack and B continues to keep clear. While both boats are head to wind B is the keep clear boat under Rule 13, last sentence. When Y and B have both completed their tacks Rules 11 applies and Rule 18.2 does not as it has been switched off by Rule 18.3.

    No rule was broken by either boat.

    Beau

    ReplyDelete
  7. Facts Found

    1. Blue and Yellow were approaching the windward mark to be rounded to starboard. Blue was fetching on the port layline. Yellow was converging on starboard, half a boat length below the starboard layline.
    2. When both boats were in the zone, Blue luffed head to wind to avoid Yellow.
    3. When Blue was head to wind, Yellow tacked and rounded the mark, inside Blue.
    4. Blue then bore away and rounded the mark outside Yellow.

    Conclusions

    1. Yellow complied with rule 18.3 because from the time she changed tack she did not cause Blue to sail above close hauled.
    2. Blue was then required to give Yellow mark room under rule 18.2(a) and did so.
    3. No rule was broken.

    Decision

    Protest dismissed.

    ReplyDelete
  8. Facts Found
    1. B and Y on port tack were approaching a windward mark to be left to starboard, B on the port tack layline, Y four hull lengths to leeward and ahead of B.
    2. Slightly below the starboard tack layline, Y tacked to starboard onto a collision course with B.
    3. While she was tacking, Y reached the zone, and at the same time B reached the zone on port tack.
    4. After Y completed her tack, B changed course up to head-to-wind, and remained head-to-wind while advanced one hull length forward, thus keeping a distance of one hull length from Y.
    5. At one hull length from the mark Y tacked back to port and rounded the mark.
    6. While Y was bearing away from head-to-wind to port tack close-hauled course during her second tacking, B also bore away to close-hauled course on port tack, simultaneously, with one hull length distance between them.
    7. B then rounded the mark behind Y.

    Conclusions
    1. After B and Y were on opposite tacks, and Y changed tack from starboard to port and as a result was subject to rule 13 in the zone while B was fetching the mark, rule 18.3 required Y not to cause B to sail above close-hauled to avoid her.
    2. Y caused B to sail above close hauled by being right of way boat on starboard tack, but it happened before rule 18.3 became applicable. Y did not break rule 18.3.
    3. No rule was broken.

    Decision
    Protest dismissed.

    ReplyDelete
  9. Fact Finding Friday Animation; Vol 11.4

    Facts Found

    1. Y and B are approaching a windward mark (starboard rounding).

    2. Y tacks and is subject to rule 13 inside the zone, while B is fetching the mark.

    3. B luffs above close hauled to reach avoid Y.

    Conclusion

    B breaks 18.3

    Decision

    B is diqualified.

    ReplyDelete
  10. Jos, did you get any other comments on this - I sent one a long time ago!

    Gordon

    ReplyDelete
  11. me too sent one a long time ago

    ReplyDelete
  12. Finally my remarks on the comments you made on FFFA 11.4:

    @John (ball_hilary); Some of the colours seem to have been mixed up. That's something you need to check, a scorer will not read the protest only read you decision!

    @Brass; agreed

    @Boris; very good!

    @Dick; your conclusions are all correct, but I would have left out all except #5

    @Gordon; Regarding your PS: Read Case 104. In the conclusions I'm missing rule 18.3

    @Beau; correct

    @John G; succinct and correct

    @Agnes; your conclusions are a little elaborate, but nevertheless reaching a correct decision

    @Anonymous; If anybody would have broken rule 18.3 it was Yellow, I think your are mixing up B and Y?
    But Blue had to keep clear of Yellow before Yellow was subject to rule 13 in the zone, therefore Yellow did not require Blue to avoid her after she became subject to rule 18.3. Read the other comments and find out where went wrong

    ReplyDelete
  13. ---------------------------
    Jos' Feedback

    @Anonymous; If anybody would have broken rule 18.3 it was Yellow, I think your are mixing up B and Y?
    But Blue had to keep clear of Yellow before Yellow was subject to rule 13 in the zone, therefore Yellow did not require Blue to avoid her after she became subject to rule 18.3. Read the other comments and find out where went wrong

    ---------------------------
    Yes, my comment should have read 'Y broke 18.3'.

    I see the point now.

    After Yellow's first tack, rule 18 did not apply until Yellow passed HTW the second time.

    Simply, on opposite tacks Blue was obliged by rule 10 to keep clear of Yellow and did so.

    Since it was not Yellow's 2nd instance of tacking which caused Blue to sail above close hauled, Yellow did not break 18.3 by her tack.

    No rule broken!

    Thanks! Got it.

    ReplyDelete

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