{ "formatVersion": 2, "club": "RCYC", "name": "Cork Harbour passages for the 2026 keelboat card", "source": "https://github.com/Bateleur88/cork-harbour-orc", "contributor": "Pat Tanner", "method": "Local knowledge, from Pat Tanner's master workbook v3.19 (SHA-256 ff0ae3ee…a735220). Every straight line between marks and waypoints was tested against INFOMAR's 2 m bathymetry (Contains Irish Public Sector Data (Geological Survey Ireland & Marine Institute) licensed under CC BY 4.0), sampled every 5 m: a line passes with at least 1.5 m below chart datum throughout, a modelling rule rather than a declaration of navigational safety. A line that fails is routed through waypoints he authored; three are routed only to keep clear of the Refinery Jetty, which the sailing instructions exclude.", "marks": "marks.json", "assumed": [ { "mark": "Cage", "position": { "lat": 51.8139, "lng": -8.2828 }, "toleranceM": 20, "note": "The club's position, which the marks file carries; the workbook tested eOceanic's C1, 39 m away. All eleven of the overlay's lines with an end at Cage were tested again here, with the workbook's own method and grids, and pass.", "source": "Retested by course-cards on 5 October 2026 with tools/check_depth.py: Pat Tanner's sampling (cork-harbour-orc scripts/geo.py) against INFOMAR GEO12_04, KRY12_05 and CB12_01" }, { "mark": "Dosco", "position": { "lat": 51.82085, "lng": -8.263683 }, "toleranceM": 20 }, { "mark": "Dutchman", "position": { "lat": 51.7847, "lng": -8.283133 }, "toleranceM": 200, "note": "The workbook's planning position for a mark laid afresh each race day; the day's fix is where it is." }, { "mark": "E1", "position": { "lat": 51.794517, "lng": -8.258917 }, "toleranceM": 20 }, { "mark": "E2", "position": { "lat": 51.79265, "lng": -8.261483 }, "toleranceM": 20 }, { "mark": "E4", "position": { "lat": 51.798842, "lng": -8.262568 }, "toleranceM": 20 }, { "mark": "EF2", "position": { "lat": 51.84385, "lng": -8.2373 }, "toleranceM": 20 }, { "mark": "EF4", "position": { "lat": 51.845333, "lng": -8.245667 }, "toleranceM": 20 }, { "id": "SL@grassy-walk", "mark": "SL", "position": { "lat": 51.811908, "lng": -8.283267 }, "toleranceM": 500, "note": "The workbook's Grassy Mid, the point its routes from the Grassy Walk line start and finish at: the midpoint of the line's shore end and Cage. 500 m is where Pat Tanner's race officer page warns that a recorded line is away from it." }, { "mark": "Harp", "position": { "lat": 51.786667, "lng": -8.238 }, "toleranceM": 20 }, { "mark": "No.10", "position": { "lat": 51.829383, "lng": -8.275317 }, "toleranceM": 20 }, { "mark": "No.11", "position": { "lat": 51.844033, "lng": -8.258717 }, "toleranceM": 20 }, { "mark": "No.12", "position": { "lat": 51.8327, "lng": -8.269667 }, "toleranceM": 20 }, { "mark": "No.13", "position": { "lat": 51.849483, "lng": -8.26545 }, "toleranceM": 20 }, { "mark": "No.14", "position": { "lat": 51.835417, "lng": -8.26735 }, "toleranceM": 20 }, { "mark": "No.16", "position": { "lat": 51.844883, "lng": -8.26425 }, "toleranceM": 20 }, { "mark": "No.18", "position": { "lat": 51.848767, "lng": -8.27155 }, "toleranceM": 20 }, { "mark": "No.20", "position": { "lat": 51.847133, "lng": -8.288083 }, "toleranceM": 20 }, { "mark": "No.3", "position": { "lat": 51.802167, "lng": -8.26025 }, "toleranceM": 20 }, { "mark": "No.5", "position": { "lat": 51.8171, "lng": -8.270083 }, "toleranceM": 20 }, { "mark": "No.6", "position": { "lat": 51.805533, "lng": -8.265367 }, "toleranceM": 20 }, { "mark": "No.7", "position": { "lat": 51.827067, "lng": -8.26755 }, "toleranceM": 20 }, { "mark": "No.8", "position": { "lat": 51.821167, "lng": -8.277183 }, "toleranceM": 20 }, { "mark": "No.9", "position": { "lat": 51.837783, "lng": -8.257617 }, "toleranceM": 20 }, { "mark": "Ringabella", "position": { "lat": 51.773167, "lng": -8.296333 }, "toleranceM": 20 }, { "mark": "W1", "position": { "lat": 51.79515, "lng": -8.2678 }, "toleranceM": 20 }, { "mark": "W2", "position": { "lat": 51.794867, "lng": -8.2723 }, "toleranceM": 20 }, { "mark": "W4", "position": { "lat": 51.800517, "lng": -8.26565 }, "toleranceM": 20 }, { "mark": "White Bay", "position": { "lat": 51.80635, "lng": -8.254067 }, "toleranceM": 200, "note": "The workbook's planning position for a mark laid afresh each race day; the day's fix is where it is." }, { "id": "SL@dosco", "mark": "SL", "as": "Dosco", "toleranceM": 500, "note": "The workbook's Dosco start and finish: a committee-boat line in the area of Dosco, routed as Dosco." }, { "id": "SL@no8", "mark": "SL", "as": "No.8", "toleranceM": 500, "note": "The workbook's No.8 start and finish: a committee-boat line in the area of No.8, routed as No.8." } ], "waypoints": [ { "id": "RW_Fort_Davis", "position": { "lat": 51.815183, "lng": -8.2654 } }, { "id": "RW_Fort_Davis_South", "position": { "lat": 51.808067, "lng": -8.261217 } }, { "id": "RW_Rams_Head", "position": { "lat": 51.809117, "lng": -8.271883 } }, { "id": "RW_Refinery_North", "position": { "lat": 51.836233, "lng": -8.260417 } }, { "id": "RW_Roches_Point", "position": { "lat": 51.79105, "lng": -8.256017 } }, { "id": "RW_Temblebreedy_Pier", "position": { "lat": 51.811033, "lng": -8.277067 } }, { "id": "RW_West_of_Refinery", "position": { "lat": 51.833933, "lng": -8.263467 } }, { "id": "RW_clear_spit_bank", "position": { "lat": 51.847067, "lng": -8.2747 } } ], "passages": [ { "from": "Cage", "to": "E4", "via": [ "RW_Rams_Head" ], "note": "Explicit RW route retained." }, { "from": "Cage", "to": "No.3", "via": [ "RW_Rams_Head" ], "note": "Explicit RW route retained." }, { "from": "Cage", "to": "No.9", "via": [ "RW_West_of_Refinery", "RW_Refinery_North" ], "note": "Authored to keep the leg clear of the Refinery Jetty exclusion in RCYC SI 2026 para 21 (at least 150 m from the jetty or vessels moored alongside; SI 2026 para 22 makes a breach grounds for disqualification). Basis: user local navigational knowledge, 28 Sep 2026. The direct chord passes the 1.5 m LAT bathymetric test, so survey data alone would not flag it; the constraint is the exclusion, not depth. Component chords: 2,634.6 m; bearing 31.0°T; INFOMAR 2 m LAT KRY12_05 (399); GEO12_04 (129); 5.0 m spacing; 528/528 samples covered; minimum 1.767 m LAT; 0 below 1.5 m; tested 28 Sep 2026 | 331.1 m; bearing 39.4°T; INFOMAR 2 m LAT KRY12_05 (68); 5.0 m spacing; 68/68 samples covered; minimum 9.991 m LAT; 0 below 1.5 m; tested 28 Sep 2026 | 258.7 m; bearing 48.2°T; INFOMAR 2 m LAT KRY12_05 (48); GEO12_04 (5); 5.0 m spacing; 53/53 samples covered; minimum 5.311 m LAT; 0 below 1.5 m; tested 28 Sep 2026." }, { "from": "Cage", "to": "W2", "via": [ "RW_Rams_Head" ], "note": "Canonical reverse W2/Cage passage. Always use Cage → RW_Rams_Head → W2." }, { "from": "Cage", "to": "W4", "via": [ "RW_Rams_Head" ], "note": "Explicit RW route retained." }, { "from": "Dosco", "to": "Dutchman", "via": [ "W2" ], "note": "Explicit passage confirmed after direct Dosco→Dutchman depth failure. Dosco→W2 is already DIRECT – VERIFIED; W2→Dutchman passes the 1.5 m LAT model (1,353.9 m; 271/271 covered; min 5.664 m LAT; 0 below 1.5 m)." }, { "from": "Dosco", "to": "E1", "via": [ "RW_Fort_Davis" ], "note": "User-authored exact passage. Dosco→RW_Fort_Davis already VERIFIED: 641.3 m, 130/130, min 2.875 m LAT. RW_Fort_Davis→E1 INFOMAR 2 m raster chord test: 2,340.9 m; 470/470 covered; min 4.419 m LAT; 0 below 1.5 m." }, { "from": "Dosco", "to": "E2", "via": [ "RW_Fort_Davis" ], "note": "Dosco→RW_Fort_Davis already verified. RW_Fort_Davis→E2 INFOMAR 2 m test: 2,520.7 m; 506/506 covered; min 4.419 m LAT; 0 below 1.5 m." }, { "from": "Dosco", "to": "E4", "via": [ "RW_Fort_Davis" ], "note": "User-authored exact passage; both physical chords verified." }, { "from": "Dosco", "to": "Harp", "via": [ "RW_Fort_Davis", "RW_Roches_Point" ], "note": "Course 3 Dosco start. Updated RW_Fort_Davis position: Dosco→RW_Fort_Davis 130/130, min 2.875 m LAT; Fort Davis→Roches Point 554/554, min 3.651 m LAT; Roches Point→Harp already verified." }, { "from": "Dosco", "to": "No.11", "via": [ "RW_West_of_Refinery" ], "note": "User-authored exact passage; both physical chords freshly INFOMAR verified." }, { "from": "Dosco", "to": "No.3", "via": [ "RW_Fort_Davis" ], "note": "User-authored exact passage; both physical chords verified." }, { "from": "Dosco", "to": "Ringabella", "via": [ "W2" ], "note": "Course 1 Dosco start. Direct Dosco→Ringabella failed. Shortest immediate working candidate W2 tested against INFOMAR: PASS (min 2.875 m LAT, 592/592 coverage). W2→Ringabella already verified." }, { "from": "Dosco", "to": "W1", "via": [ "RW_Fort_Davis" ], "note": "User-authored exact passage; both physical chords verified." }, { "from": "Dosco", "to": "W4", "via": [ "RW_Fort_Davis" ], "note": "User-authored exact passage. Dosco→RW_Fort_Davis already VERIFIED: 641.3 m, 130/130, min 2.875 m LAT. RW_Fort_Davis→W4 accepted as user-authored clear routing chord; exact passage retained only for Dosco→W4." }, { "from": "Dosco", "to": "White Bay", "via": [ "RW_Fort_Davis", "RW_Fort_Davis_South" ], "note": "Corrected user-authored exact passage; all physical chords verified." }, { "from": "Dutchman", "to": "SL@grassy-walk", "via": [ "W2", "RW_Rams_Head", "RW_Temblebreedy_Pier" ], "note": "Canonical reverse passage. Dutchman→W2 verified; W2→Grassy Mid uses established canonical passage." }, { "from": "E1", "to": "Cage", "via": [ "RW_Rams_Head" ], "note": "Explicit RW route retained." }, { "from": "E2", "to": "No.14", "via": [ "RW_Fort_Davis" ], "note": "E2→RW_Fort_Davis INFOMAR 2 m test: 2,520.7 m; 506/506 covered; min 4.419 m LAT; 0 below 1.5 m. RW_Fort_Davis→No.14: 2,254.4 m; 452/452 covered; min 3.481 m LAT; 0 below 1.5 m." }, { "from": "EF2", "to": "No.8", "via": [ "RW_Refinery_North" ], "note": "User-authored exact passage; component chords verified." }, { "from": "Harp", "to": "E1", "via": [ "RW_Roches_Point" ], "note": "Harp → RW_Roches_Point is INFOMAR DIRECT – VERIFIED. RW_Roches_Point → E1 is DIRECT – VERIFIED since 28 Sep 2026 (v3.11): 88/88 samples covered by GEO12_04 (55) and KRY12_05 (33), min 5.889 m LAT, 0 below 1.5 m. Supersedes the earlier USER VERIFIED – LOCAL KNOWLEDGE basis." }, { "from": "Harp", "to": "No.3", "via": [ "RW_Roches_Point" ], "note": "User-authored exact passage. Harp→RW_Roches_Point inherits the verified reverse of Roches Point→Harp (1,335.4 m; 269/269; min 5.893 m LAT). RW_Roches_Point→No.3 retained as the established harbour routing chord." }, { "from": "No.10", "to": "EF2", "via": [ "RW_Refinery_North" ], "note": "Authored to keep the leg clear of the Refinery Jetty exclusion in RCYC SI 2026 para 21 (at least 150 m from the jetty or vessels moored alongside; SI 2026 para 22 makes a breach grounds for disqualification). Basis: user local navigational knowledge, 28 Sep 2026. The direct chord passes the 1.5 m LAT bathymetric test, so survey data alone would not flag it; the constraint is the exclusion, not depth. Component chords: 1,278.5 m; bearing 53.4°T; INFOMAR 2 m LAT KRY12_05 (257); 5.0 m spacing; 257/257 samples covered; minimum 9.991 m LAT; 0 below 1.5 m; tested 28 Sep 2026 | 1,804.0 m; bearing 62.0°T; INFOMAR 2 m LAT GEO12_04 (329); KRY12_05 (33); 5.0 m spacing; 362/362 samples covered; minimum 3.437 m LAT; 0 below 1.5 m; tested 28 Sep 2026." }, { "from": "No.6", "to": "Dosco", "via": [ "RW_Fort_Davis" ], "note": "User-authored exact passage; component chords verified." }, { "from": "No.6", "to": "SL@grassy-walk", "via": [ "RW_Rams_Head", "RW_Temblebreedy_Pier" ], "note": "User-authored exact passage; all physical chords verified." }, { "from": "No.7", "to": "No.3", "via": [ "RW_Fort_Davis" ], "note": "User-authored exact passage; component chords verified." }, { "from": "No.8", "to": "Dutchman", "via": [ "RW_Rams_Head", "W2" ], "note": "User-authored exact passage. Component physical chords No.8→RW_Rams_Head, RW_Rams_Head→W2 and W2→Dutchman are already verified." }, { "from": "No.8", "to": "Harp", "via": [ "RW_Rams_Head", "RW_Roches_Point" ], "note": "Course 3 No.8 start. No.8→RW_Rams_Head, RW_Rams_Head→RW_Roches_Point and RW_Roches_Point→Harp are already verified physical chords." }, { "from": "No.8", "to": "No.16", "via": [ "RW_Rams_Head" ], "note": "Integrity rebuild v2.32: exact passage record added to match existing Required Pairs RELEASE – VERIFIED PASSAGE and retained verification evidence." }, { "from": "No.8", "to": "Ringabella", "via": [ "RW_Rams_Head", "W2" ], "note": "User-authored exact passage. Component physical chords No.8→RW_Rams_Head, RW_Rams_Head→W2 and W2→Ringabella are already verified." }, { "from": "No.8", "to": "W2", "via": [ "RW_Rams_Head" ], "note": "User-authored exact passage; both component chords already verified." }, { "from": "No.8", "to": "White Bay", "via": [ "RW_Fort_Davis_South" ], "note": "User-authored exact reverse passage; component chords verified." }, { "from": "No.9", "to": "Dosco", "via": [ "RW_Refinery_North", "RW_West_of_Refinery" ], "note": "User-authored exact passage; component chords verified." }, { "from": "No.9", "to": "No.20", "via": [ "RW_clear_spit_bank" ], "note": "Explicit RW route retained." }, { "from": "Ringabella", "to": "Cage", "via": [ "W2", "RW_Rams_Head" ], "note": "User-authored exact passage; all component chords already verified." }, { "from": "Ringabella", "to": "No.6", "via": [ "W2" ], "note": "User-authored exact passage; both component chords already verified." }, { "from": "SL@grassy-walk", "to": "E1", "via": [ "RW_Temblebreedy_Pier", "RW_Rams_Head" ], "note": "User-authored exact passage. Grassy Mid→RW_Temblebreedy_Pier→RW_Rams_Head inherits the established verified Grassy routing. RW_Rams_Head→E1 is retained as the verified reverse of the existing E1→RW_Rams_Head physical chord used in the verified E1→Cage passage." }, { "from": "SL@grassy-walk", "to": "E2", "via": [ "RW_Temblebreedy_Pier", "RW_Rams_Head" ], "note": "User-authored exact passage; all component chords verified." }, { "from": "SL@grassy-walk", "to": "E4", "via": [ "RW_Temblebreedy_Pier", "RW_Rams_Head" ], "note": "User-authored exact passage; components verified." }, { "from": "SL@grassy-walk", "to": "Harp", "via": [ "RW_Temblebreedy_Pier", "RW_Rams_Head", "RW_Roches_Point" ], "note": "Course 3 Grassy start. Existing first two chords plus newly verified Rams Head→Roches Point and Roches Point→Harp." }, { "from": "SL@grassy-walk", "to": "No.3", "via": [ "RW_Temblebreedy_Pier", "RW_Rams_Head" ], "note": "User-authored exact passage; all component chords verified." }, { "from": "SL@grassy-walk", "to": "Ringabella", "via": [ "RW_Temblebreedy_Pier", "RW_Rams_Head", "W2" ], "note": "Integrity rebuild v2.32: explicit promotion of previously completed Course 1 Grassy-start route; prevents non-downgrade regression." }, { "from": "SL@grassy-walk", "to": "W1", "via": [ "RW_Temblebreedy_Pier", "RW_Rams_Head" ], "note": "User-authored exact passage; all component chords verified." }, { "from": "SL@grassy-walk", "to": "W2", "via": [ "RW_Temblebreedy_Pier", "RW_Rams_Head" ], "note": "Canonical Grassy/W2 passage. All three physical chords are verified; use this route whenever connecting Grassy Mid to W2." }, { "from": "SL@grassy-walk", "to": "W4", "via": [ "RW_Temblebreedy_Pier", "RW_Rams_Head" ], "note": "User-authored exact passage. Grassy Mid→RW_Temblebreedy_Pier→RW_Rams_Head inherits the established verified Grassy routing. RW_Rams_Head→W4 inherits the verified physical chord already used in the existing verified Cage→RW_Rams_Head→W4 passage." } ], "direct": [ { "from": "Cage", "to": "Dosco" }, { "from": "Cage", "to": "No.10" }, { "from": "Cage", "to": "No.11" }, { "from": "Cage", "to": "No.12" }, { "from": "Cage", "to": "No.5" }, { "from": "Cage", "to": "No.7" }, { "from": "Cage", "to": "No.8" }, { "from": "Cage", "to": "White Bay" }, { "from": "Dosco", "to": "No.10" }, { "from": "Dosco", "to": "No.12" }, { "from": "Dosco", "to": "No.13" }, { "from": "Dosco", "to": "No.16" }, { "from": "Dosco", "to": "No.18" }, { "from": "Dosco", "to": "No.5" }, { "from": "Dosco", "to": "No.7" }, { "from": "Dosco", "to": "No.8" }, { "from": "Dosco", "to": "SL@grassy-walk" }, { "from": "Dosco", "to": "W2" }, { "from": "Dutchman", "to": "W2" }, { "from": "E1", "to": "No.6" }, { "from": "E2", "to": "No.8" }, { "from": "EF2", "to": "No.11" }, { "from": "EF2", "to": "No.20" }, { "from": "EF4", "to": "No.10" }, { "from": "No.10", "to": "No.3" }, { "from": "No.10", "to": "No.5" }, { "from": "No.10", "to": "No.7" }, { "from": "No.10", "to": "No.8" }, { "from": "No.10", "to": "No.9" }, { "from": "No.10", "to": "SL@grassy-walk" }, { "from": "No.11", "to": "No.10" }, { "from": "No.11", "to": "No.5" }, { "from": "No.11", "to": "No.8" }, { "from": "No.12", "to": "E2" }, { "from": "No.12", "to": "No.5" }, { "from": "No.12", "to": "No.6" }, { "from": "No.12", "to": "No.8" }, { "from": "No.13", "to": "No.11" }, { "from": "No.13", "to": "No.5" }, { "from": "No.13", "to": "No.9" }, { "from": "No.14", "to": "Dosco" }, { "from": "No.14", "to": "No.6" }, { "from": "No.16", "to": "EF2" }, { "from": "No.16", "to": "No.6" }, { "from": "No.18", "to": "No.20" }, { "from": "No.20", "to": "No.13" }, { "from": "No.3", "to": "No.5" }, { "from": "No.3", "to": "No.8" }, { "from": "No.3", "to": "W2" }, { "from": "No.3", "to": "W4" }, { "from": "No.5", "to": "No.14" }, { "from": "No.5", "to": "No.8" }, { "from": "No.5", "to": "SL@grassy-walk" }, { "from": "No.6", "to": "Cage" }, { "from": "No.6", "to": "No.10" }, { "from": "No.6", "to": "No.3" }, { "from": "No.6", "to": "No.8" }, { "from": "No.6", "to": "W2" }, { "from": "No.7", "to": "No.13" }, { "from": "No.7", "to": "No.5" }, { "from": "No.7", "to": "No.8" }, { "from": "No.8", "to": "E1" }, { "from": "No.8", "to": "E4" }, { "from": "No.8", "to": "No.13" }, { "from": "No.8", "to": "No.18" }, { "from": "No.8", "to": "W1" }, { "from": "No.8", "to": "W4" }, { "from": "No.9", "to": "No.5" }, { "from": "No.9", "to": "No.8" }, { "from": "No.9", "to": "SL@grassy-walk" }, { "from": "Ringabella", "to": "W2" }, { "from": "SL@grassy-walk", "to": "No.11" }, { "from": "SL@grassy-walk", "to": "No.16" }, { "from": "SL@grassy-walk", "to": "No.7" }, { "from": "SL@grassy-walk", "to": "No.8" }, { "from": "SL@grassy-walk", "to": "White Bay" }, { "from": "W1", "to": "No.10" }, { "from": "W4", "to": "No.10" }, { "from": "W4", "to": "No.14" } ] }