{ "club": "Howth Yacht Club", "event": "Autumn League 2026", "documents": [ { "output": "source/2026_AL_Sis.md", "source": "source/2026_AL_Sis.pdf", "url": "https://hyc.ie/system/resources/2557/original/2026_AL_Sis.pdf", "title": "Autumn League 2026 sailing instructions", "why": "6.1 and 6.2 A and B place the offshore and inshore starting areas and define their starting lines, which the cards do not; 6.1 C and 6.2 C say the windward mark Z is laid to windward of the line and is the first mark of every fixed-mark course, and that the course card forms part of these instructions; 6.1 D is the run in to the offshore finish, which the card does not print either." }, { "output": "source/Autumn_League_SI_Amendment_01.md", "source": "source/Autumn_League_SI_Amendment_01.pdf", "url": "https://hyc.ie/system/resources/2560/original/Autumn_League_SI_Amendment_01.pdf", "title": "Autumn League 2026, sailing instructions amendment 01", "why": "Replaces 6.2 D, the inshore finishing line, adding the instruction to pass Spit to starboard on the way to it that the inshore card already printed. It is the wording the inshore card's finish is read from, and it leaves 6.2 A and B, which the start line is read from, as they were." } ], "artifacts": [ { "output": "marks.json", "tool": "extract_marks", "source": "../al-2025/source/AL_Course_Card_Technical_Sheet.pdf", "url": "https://hyc.ie/system/resources/2331/original/AL_Course_Card_Technical_Sheet.pdf", "why": "The club has not published a 2026 technical sheet, though SI 6.1 C and 6.2 C name one; the 2025 sheet is the current list of the marks these cards letter, and the drafts these cards were published from were laid out on its positions — see the README.", "addMarks": { "why": "SI 6.1 D sends every offshore course in to the finish \"passing the Rowan Rocks Buoy and the Howth Mark (both IALA marks) to starboard\". Rowan Rocks is Q on the club's sheet; the Howth Mark it does not letter, and the run in cannot be marks of a course without it. The position is the Commissioners of Irish Lights buoy of that name as OpenStreetMap holds it — node 1592333181, seamark:reference CIL00910, © OpenStreetMap contributors — the same source as the chart imagery and as the East Pier lighthouse the offshore finish is placed from.", "marks": [ { "id": "HM", "name": "Howth", "shape": "iala", "color": "green", "position": { "lat": 53.395451, "lng": -6.059883 }, "source": "OpenStreetMap node 1592333181 (CIL00910)" } ] }, "meta": { "club": "HYC", "name": "Autumn League racing marks, from the 2025 course card technical sheet, with the Howth Mark SI 6.1 D names", "source": "https://hyc.ie/system/resources/2331/original/AL_Course_Card_Technical_Sheet.pdf", "notes": [ { "title": "Positions", "text": "Racing Marks (Approx)" } ] } }, { "output": "offshore.json", "tool": "extract_hyc_al_card", "source": "source/Offshore_Autumn_League_HYC_Course_Card_-_2026_Rev_1_1st_Oct_26.pdf", "url": "https://hyc.ie/system/resources/2558/original/Offshore_Autumn_League_HYC_Course_Card_-_2026_Rev_1_1st_Oct_26.pdf", "meta": { "club": "HYC", "name": "Autumn League 2026 course card, offshore committee vessel starts", "source": "https://hyc.ie/system/resources/2558/original/Offshore_Autumn_League_HYC_Course_Card_-_2026_Rev_1_1st_Oct_26.pdf", "marks": "marks.json" }, "startLine": { "source": "source/2026_AL_Sis.pdf", "after": "6.1 Offshore Committee Vessel Starts:", "clauses": [ "A Starting Area", "B Starting Line" ], "meta": { "id": "SL", "name": "Start line", "source": "HYC Autumn League 2026 sailing instructions 6.1 A and B", "ends": [ { "end": "starboard", "name": "Red/white pole (or mainmast) on the Committee Starting Vessel", "placement": "Laid on the day" }, { "end": "port", "name": "Orange outer distance mark", "placement": "Laid on the day" } ] }, "why": "B says the outer distance mark is \"to be passed to port\": a boat starting leaves it on her port hand, so it is the port end, and the committee vessel the starboard." }, "finish": { "source": "source/2026_AL_Sis.pdf", "after": "6.1 Offshore Committee Vessel Starts:", "clauses": [ "Round the Cans Races" ], "why": "The card prints no course past K or G, and SI 6.1 D is what every course does next: \"boats shall sail to the finish line passing the Rowan Rocks Buoy and the Howth Mark (both IALA marks) to starboard\". The same ending for all 144 courses, so it is appended to each of them rather than left in prose — a course read off the card alone stops a mile and more short of the line, and a scorer who divides elapsed time by that length gets the boats slower than they sailed. The Windward/Leeward finish in the same instruction is a different course and no concern of this card.", "meta": { "id": "FH", "name": "Finish line", "position": { "lat": 53.39334, "lng": -6.06529 }, "source": "HYC Autumn League 2026 sailing instructions 6.1 D" }, "via": [ { "mark": "Q", "side": "starboard", "passing": true }, { "mark": "HM", "side": "starboard", "passing": true } ] }, "chart": { "note": "The card's own marks, and the run in to the East Pier its courses finish at." } }, { "output": "inshore.json", "tool": "extract_hyc_al_card", "source": "source/Inshore_Autumn_League_HYC_Course_Card_-_2026_Rev_1st_Oct_2026.pdf", "url": "https://hyc.ie/system/resources/2559/original/Inshore_Autumn_League_HYC_Course_Card_-_2026_Rev_1st_Oct_2026.pdf", "meta": { "club": "HYC", "name": "Autumn League 2026 course card, inshore committee vessel starts", "source": "https://hyc.ie/system/resources/2559/original/Inshore_Autumn_League_HYC_Course_Card_-_2026_Rev_1st_Oct_2026.pdf", "marks": "marks.json" }, "startLine": { "source": "source/2026_AL_Sis.pdf", "after": "6.2 Inshore Committee Vessel Starts:", "clauses": [ "A Starting Area", "B Starting Line" ], "meta": { "id": "SL", "name": "Start line", "source": "HYC Autumn League 2026 sailing instructions 6.2 A and B", "ends": [ { "end": "starboard", "name": "Red/white pole or the main mast of the Committee Starting Vessel", "placement": "Laid on the day" }, { "end": "port", "name": "Orange buoy with an orange flag", "placement": "Laid on the day" } ] }, "why": "B says the orange buoy is \"to be passed to port\": a boat starting leaves it on her port hand, so it is the port end, and the committee vessel the starboard." }, "finish": { "source": "source/Autumn_League_SI_Amendment_01.pdf", "clauses": [ "Round the Cans Races" ], "why": "The card prints no course past its last fixed mark, and SI 6.2 D, as amendment 01 replaces it, is what every course does next: \"From the last mark on the displayed course, boats shall sail to the finish line passing the Spit mark to starboard\" — which the card's own note 2 prints too. The line itself is a buoy and a committee vessel laid on the day, so it has a placement and no position: a consumer is asked for it, as it is asked for the start line and for Z. The amendment is the current wording of 6.2 D and is what this reads.", "meta": { "id": "F", "name": "Finish line", "source": "HYC Autumn League 2026 sailing instructions 6.2 D, as amendment 01 replaces it" }, "via": [ { "mark": "S", "side": "starboard", "passing": true } ] }, "chart": { "note": "The card's own marks, and the Spit and South Rowan it finishes between.", "keep": [ { "mark": "R", "why": "SI 6.2 D, as amended, and the card's own note 2 put the finish in the vicinity of the South Rowan buoy; no course sails to it, the run in passing Spit alone." } ] } } ], "map": { "background": "map/background.png", "marks": "marks.json", "layers": [ "osm", "openseamap" ], "zoom": 14, "paddingMinutes": 0.6 }, "variation": { "date": "2026-10-01", "why": "Mid-series: the league is sailed from 12 September to 17 October 2026. Card pages work out the magnetic variation for this date at the middle of the marks from the World Magnetic Model; the variation changes by about a tenth of a degree a year here, so any day of the series gives the same figure." } }