Ireland

The world's oldest sailing nation. J-Boats, the Irish Sea, and the Fastnet.

Kinship

Every fleet has a fingerprint.

From the Solent’s tide-lines to the Aegean Meltemia — find your waters.

 Hidden Shape

11 archetypes across 31 dimensional features.
How this country's fleet clusters before the results arrive.

How every Irish boat clusters, before the results arrive.
Kinship

Royal Cork, 1720. Still racing.

165 Irish boats make Ireland a J-Boats-heavy Atlantic fleet shaped by ISORA cross-Irish-Sea racing and the Fastnet Rock in the backyard — AEROMAX-led, Johnstone-designer-dominant, with upwind-power archetypes carrying 46.1% of the distribution.

165
boats
11
archetypes
36
J/Boats-family
22%
Johnstone density
National cohort · as of 2026-04-21 · build a2e90234

ORC Authority: ORC Ireland

ORC Ireland governs a fleet steeped in the world's oldest sailing heritage. The Royal Cork Yacht Club, founded in 1720, is the oldest yacht club in the world, and Irish offshore racing centres on the Irish Sea Offshore Racing Association (ISORA) circuit, Cork and Dublin club racing, and Ireland's home-water access to the Rolex Fastnet — Fastnet Rock sits off the southwest coast, turning the 600 nm Cowes-to-Cherbourg track into a back-garden run for Irish offshore campaigns.

Ireland is J-Boats country. Johnstone R (J/Boats) holds 22.0% designer density across 36 boats — more than one in five Irish boats sails to a Rod Johnstone line. The J 109 leads all classes at 13 boats alongside the J-80 OD at 11, with the First 36.7 and First 34.7 each at 9 and the First 31.7 rounding the top five. AEROMAX leads the archetype mix at 17.0% (28 boats), followed by HEADFORCE at 15.2% (25 boats) and GRAVITYRUN at 13.9% (23 boats) — upwind power, pressure-driven chop-punching, and momentum-building hulls for the Irish Sea's blend of chop, tidal gates, and Atlantic weather arriving from the west.

The 2026 Irish season runs ISORA, Cork Week, and the Round Ireland Race circuit through the Fastnet gap year — the Rolex Fastnet is biennial and the next running is 2027, so 2026 is a domestic-first season where the ISORA points chase, the Round Ireland 704 nm loop, and the club-level Cork and Dublin Bay championships shape the competitive focus until the home-water offshore returns.

Hidden Shape

The shape of the Irish fleet.

165 Irish boats across 11 archetypes — here's how they cluster, and what the collective signature reveals about Irish Sea and Atlantic offshore racing.

The Irish ORC Fleet Signature

Ireland's fleet is an upwind-power collective shaped by the Irish Sea and Atlantic offshore. AEROMAX leads at 17.0% (28 boats) — power-efficient upwind-biased hulls optimised for the Irish Sea's blend of chop and reaching conditions. HEADFORCE follows at 15.2% (25 boats) with pressure-driven compact-rig geometry that punches through chop at the windward mark, and GRAVITYRUN anchors the top three at 13.9% (23 boats) with heavy-mode momentum for the sustained-breeze offshore track. The top-three upwind-power cluster carries 46.1% of the Irish fleet, and 22.0% of the national cohort sails to Rod Johnstone's designer canon — the J 109 and J-80 OD are the ISORA and club-level pairing, and the Grand Soleil, J/122, and Mills hulls carry the offshore pointy end where the Fastnet track demands it. All 11 archetypes are represented.

  • AEROMAX 17.0% · 28 boats
  • HEADFORCE 15.2% · 25 boats
  • GRAVITYRUN 13.9% · 23 boats

Dimension emphasis: Comp & Time · Crew Effectiveness · Hull Efficiency

The 2026 Irish season runs ISORA and Cork Week domestic — a Fastnet gap-year focus on the ISORA points chase, the Round Ireland 704 nm loop, and club-level offshore until the home-water Rolex Fastnet returns for its 2027 running on the Fastnet Rock.

High confidence Production

Aeromax

Power-efficiency hybrid with strong upwind drive and moderate displacement.

Boats 28
Share 17.0%

Headforce

Pressure-driven compact-rig hull that punches through chop at the windward mark.

Boats 25
Share 15.2%

Gravityrun

Heavy-mode momentum boat with strong downwind power in sustained breeze.

Boats 23
Share 13.9%

Steelform

Compact-rig stiff-platform with the fleet's lowest race-to-race variance.

Boats 15
Share 9.1%

Balancecore

Heel-sensitive platform with a wider, more forgiving performance envelope.

Boats 15
Share 9.1%

Ironwind

Stiff, stable-drive platform with predictable load behaviour.

Boats 10
Share 6.1%

Glideform

Low-drag hull with strong downwind bias through efficient waterline-to-beam ratios.

Boats 9
Share 5.5%

Aeroblade

Refined-rig platform with sharp heel sensitivity and rapid trim response when sailed flat.

Boats 9
Share 5.5%

Deepframe

Deep-hull efficiency paired with a stiff platform for drag-optimised flow.

Boats 6
Share 3.6%

Keelflex

Narrow stability window; fast when perfectly balanced, punishing when not.

Boats 5
Share 3.0%

Stormline

Big-rig heel-sensitive platform with the fleet's highest rig-power-to-stability ratio.

Boats 3
Share 1.8%

Irish fleet diversity across 11 archetypes. AEROMAX, HEADFORCE, and GRAVITYRUN cluster 46.1% of the fleet around upwind power and pressure-driven drive — exactly the geometry the Irish Sea's chop and the Fastnet's sustained Atlantic breeze reward. STEELFORM and BALANCECORE tie at 9.1% each for the heavy-displacement and heel-sensitive tier, and the long tail from IRONWIND (6.1%) through STORMLINE (1.8%) shows all 11 archetypes represented. 17 boats (10.3%) remain unclassified in the current fleet state.

Archetypes in the Irish fleet, grounded in real platforms.

AEROMAX

17.0% · 28

Power-efficient upwind-biased hulls for Irish Sea chop and reaching.

  • J 109Johnstone R / J Boats (13 boats)
  • Grand Soleil 40 (NIEULARGO)Botin / Cantiere del Pardo
  • J 122Johnstone R / J Boats

Irish AEROMAX boats cluster on the J/Boats offshore line and the Grand Soleil mid-size — upwind-power platforms that match the Irish Sea's chop-and-reach mix, and the archetype that NIEULARGO carried to a 13.82 sec/nm corrected-time lead in the Irish cohort at the 2025 Rolex Fastnet.

HEADFORCE

15.2% · 25

Pressure-driven compact-rig hulls punching through chop at the windward mark.

  • First 36.7Farr / Beneteau (9 boats)
  • First 34.7Farr / Beneteau (9 boats)
  • First 31.7Finot / Beneteau (4 boats)

Irish HEADFORCE boats cluster on the Beneteau First production line — Farr and Finot designs that punch into Irish Sea chop on the ISORA circuit's upwind-heavy coastal courses, forming the second backbone of the Irish fleet behind the J/Boats designer canon.

GRAVITYRUN

13.9% · 23

Heavy-mode momentum hulls built for sustained offshore breeze.

  • Grand Soleil 43Felci / Cantiere del Pardo
  • Swan 45Frers / Nautor Swan
  • X-41Nissen / X-Yachts

Irish GRAVITYRUN boats cluster on the mid-size offshore cruiser-racer canon — momentum-building hulls that convert sustained Irish Sea and Atlantic breeze into long-run average speed, the archetype that holds up across the Round Ireland 704 nm loop and the Fastnet 600 nm track.

What we saw

From the Irish cohort at the 2025 Rolex Fastnet.

Five Irish boats raced the 600 nm Rolex Fastnet 2025 track — a J122, a Grand Soleil 40, a Mills 36, a First 36.7, and a Grand Soleil 39 — and the national cohort produced a clean leader, a clean under-conversion, and a 60%-AEROMAX class-cluster signature in a single 600-mile read. Four insights from the Irish cohort at home water, and the 2026 Fastnet gap-year horizon ahead.

Pre-race window · Archetype-Conditions

2026 is a Fastnet gap year — ISORA and the Round Ireland carry the Irish offshore season.

The Rolex Fastnet Race is biennial, and the next running is 2027. Ireland's 2026 offshore calendar therefore runs ISORA cross-Irish-Sea racing, Cork Week, and the Round Ireland Race 704 nm loop instead of the Fastnet 600 nm home-water track. Irish Sea chop plus Atlantic weather arriving from the west is the exact pressure-and-waves pattern that AEROMAX and HEADFORCE were built for — upwind power on reaching-to-upwind transitions, righting-moment drive through build-and-release chop. The Irish fleet's 46.1% top-three upwind-power density is the highest of any Atlantic-facing national fleet on FleetEdge, and a Fastnet gap year is exactly when that signature matters most: the ISORA points chase accumulates across a whole domestic season, not a single 600-mile result. Pre-race speculation — actual conditions and crew execution will arbitrate.

  • IRL upwind-power density: 46.1% (top 3)
  • 2026 anchor: ISORA + Round Ireland · Fastnet gap year
Pre-race speculative FE Weather × Archetype (historical)
Magnitude Gap

NIEULARGO cleared the Irish field at Fastnet 2025 by 13.82 sec/nm.

NIEULARGO (Grand Soleil 40, AEROMAX) finished 1st of the 4-boat Irish corrected-time cohort at the 2025 Rolex Fastnet at −21.13 sec/nm vs ORC — 13.82 sec/nm clear of runner-up AURELIA (J 122, AEROMAX) at −7.31 and a 43.14 sec/nm spread to the cohort tail. Across a 600 nm track that combines reaching, upwind, and offshore distance, a 13.82 sec/nm corrected-time gap is the equivalent of nearly three minutes per hour of racing pace clear of the Irish runner-up. The Grand Soleil 40 is a Botin-designed AEROMAX platform that matches the Irish Sea and Western Approaches conditions almost exactly — upwind drive married to reaching ability, the AEROMAX trait pair that the Fastnet track rewarded in 2025.

  • NIEULARGO Comp Time: −21.13 sec/nm · 1st of 4
  • Gap to runner-up AURELIA: 13.82 sec/nm
High confidence RR Rolex Fastnet 2025 · IRL cohort
Hull Edge / Under-Conversion

PRIME SUSPECT led the Irish cohort on Sail Drive and gave the margin back on corrected time.

PRIME SUSPECT (Mills 36) posted Sail Drive Index 34 — 1st of 4 in the Irish Fastnet 2025 cohort, and the highest RM/displacement ratio at 28.60 — but finished 3rd of 4 on Comparative Time at +20.65 sec/nm, giving back the structural advantage on the scoreboard. The Mills 36 is a design the rating system rewards: high righting moment, efficient sail-drive geometry, the ingredients that should convert to corrected-time lead. What the 600 nm Fastnet track showed is a classic under-conversion gap — platform potential above the Irish fleet, delivered margin below it. Platform and execution didn't close the gap on this particular run; an opportunity for the team to tighten what's already there.

  • Sail Drive: 34 (1st of 4) · RM/displ 28.60
  • Comp Time delivered: +20.65 sec/nm (3rd of 4)
High confidence RR Rolex Fastnet 2025 · IRL cohort
Nationality/Class/Designer Cluster

The J/Boats line anchors 22% of the Irish fleet — and three Irish boats at the 2025 Fastnet were all AEROMAX.

Rod Johnstone's J/Boats line holds 22.0% designer density across the 165-boat Irish fleet — 36 Irish boats on a J 109, J-80 OD, J-24, or J/122 platform, more than one in five national boats to a single design house. The 2025 Rolex Fastnet Irish cohort carried that signature forward in miniature: three of the five Irish Fastnet entries were AEROMAX boats (NIEULARGO Grand Soleil 40, AURELIA J 122, PRIME SUSPECT Mills 36), a 60% AEROMAX cluster where the national average is 17.0%. Three different classes, one common hull-shape family: power-efficient upwind-biased geometry is what Ireland sent to the 600 nm track, and the class cluster matches the 22% designer-density pattern of the macro fleet — a structural fingerprint that holds from the ISORA club line to the Fastnet offshore pointy end.

  • Johnstone R designer density: 22.0% · 36 boats
  • IRL Fastnet 2025 AEROMAX share: 60% · 3 of 5 entries
High confidence RR Rolex Fastnet 2025 · IRL cohort
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