# Kinetic · Surfing: sources and verification notes

All checks done **3 Oct 2026 (IST)**. "Verified" means the official page was loaded and the stated fact was read on it, unless noted otherwise. The page deliberately shows **no prices or fees**. Kovalam Surf Club's lesson page lists lesson prices; they are **not reproduced**.

## 1. Physics (chapters, quiz, Wave Lab)

| Claim | Basis |
|---|---|
| Deep-water linear wave theory: L = gT²/2π ≈ 1.56T², c = gT/2π, group speed = c/2 (6 s → 56 m; 8 s → 100 m, 12.5 m/s, 22.5 km/h, 44.5 h per 1,000 km; 12 s → 225 m, 29.7 h; 16 s → 400 m) | Textbook oceanography (computed) |
| Shallow-water speed √(gd); breaking when H ≈ 0.78 d (McCowan-type rule of thumb; 1 m → 1.28 m depth, 3.5 m/s) | Textbook rule of thumb (**not fetched**); labelled as a rule of thumb on the page |
| Spilling vs plunging breakers by beach slope; reef/point/beach breaks; offshore wind grooms waves | General surf science (**not fetched**) |
| Buoyancy: seawater ≈ 1.025 kg/L; 80 L → ≈ 82 kg | Archimedes (computed). Board volumes (30/50/80 L) are **typical examples**, labelled "not a sizing guide" |
| v = √(2gh) on the face (1.5 m → 5.4 m/s ≈ 20 km/h) | Energy conservation (computed) |
| E = ⅛ρgH²; P = ρg²H²T/64π (1 m 8 s → 3.9 kW/m; 2 m 12 s → 23.5 kW/m; 0.5 m 6 s → 0.7 kW/m) | Linear wave theory (computed, ρ = 1025 kg/m³) |
| Rip crossing worked example (30 m wide, 1.5 m/s rip, 1 m/s swimmer → 30 s, 45 m) | Computed, illustrative |
| Etiquette (priority, drop-ins), leash use, monsoon roughness on west coast | General surf knowledge (**not fetched**) |

## 2. Rip currents

| Item | URL | Status |
|---|---|---|
| Channel rips typically 1–2 ft/s, up to 8 ft/s; hard to stand against at waist depth; form at gaps in sandbars and along structures | https://www.weather.gov/safety/ripcurrent-science | loaded |
| Up to 8 ft/s, "faster than an Olympic swimmer"; swim parallel to shore | https://oceanservice.noaa.gov/facts/ripcurrent.html | loaded |

## 3. Governing bodies and courses

| Body | URL | Status |
|---|---|---|
| ISA: "Surfing's World Governing Authority as recognized by the International Olympic Committee"; World Surfing Games 2026 (Punta Rocas, Peru, 6–15 Nov); surfing's first Asian Games appearance (2026) | https://isasurf.org/ | loaded |
| ISA Surf Level 1: online intro course, then Level 1 with an ISA Course Presenter; surfing-ability standard; 20 supervised practical hours; valid lifesaving/surf-rescue award; Code of Conduct. Level 2 needs Level 1. ISA/ILS water-safety course for instructors | https://isasurf.org/learning/isa-courses/ | loaded (course costs on that page **not reproduced**) |
| WSL: Championship Tour, Challenger Series, Qualifying Series, Junior Tour | https://www.worldsurfleague.com/ | loaded |
| SFI: recognised NGB for surfing and SUP; recognised by ISA, Asia Surfing Federation and MYAS; accredits schools | https://www.surfingfederationofindia.org/ | loaded |
| SFI accreditation: State/Club/Individual membership (individual = athletes in national championships); TNSA (2023), Karnataka Surfing Association (2025), Surfing Kerala (2025); Goa application submitted; Maharashtra under review | https://www.surfingfederationofindia.org/accreditation | loaded |
| SFI accreditation guidelines: ≥ 1 active ISA-certified instructor, beach staff with active ILS lifeguard certification, non-certified instructors must not teach beginners independently, safety briefing, emergency action plan, posted weather and safety info | https://www.surfingfederationofindia.org/guidelines | loaded |
| SFI courses: ISA courses since 2014, over 300 certified; ISA/ILS Ocean Safety Course 10–11 Mar 2026 and ISA Surf Instructor Level 1 12–13 Mar 2026 at Varkala | https://www.surfingfederationofindia.org/courses | loaded |
| SFI events 2026: Indian Open of Surfing (Karnataka, 28–31 May); Point Break Challenge (Mahabalipuram, 30 Jul–1 Aug); Covelong Classic (Kovalam TN, 6–8 Aug); WSL Shore Temple Classic QS 2000 + first Pro Junior (Mahabalipuram, 12–16 Aug, with SFI and TNSA; second WSL event in India after 2023) | https://www.surfingfederationofindia.org/events | loaded |

## 4. Schools

| School | URL | Status |
|---|---|---|
| Kovalam Surf Club (Lighthouse Beach, Kovalam, Kerala): since 2005; ages 5–60; basic swimming required; ~1.5 h lessons with internationally certified instructor; Levels 1–4; 3–5 classes per level; English/Malayalam/Tamil/Hindi; free lessons for local children | https://www.kovalamsurfclub.com/surfschool | loaded (prices on page **not reproduced**) |
| Kallialay Surf School (Serenity Beach, near Puducherry): since 2009; lessons every day of the year depending on sea; 50 m swim for group lessons; under-11s private; soft-top boards and rash vests | https://surfschoolindia.com/surf-school-faq/ | loaded via WebFetch (curl got no response) |
| Mantra Surf Club (Mulki, Karnataka): "India's First Surf School. Established in 2004"; beginner lessons over three or five days; ISA-certified instructors; intermediate and advanced coaching | https://surfingindia.net/surf-school-india/ | loaded via WebFetch |
| Cocopelli Surf School (Gokarna): est. 2010, first surf school in Gokarna; recognised by ISA and SFI (its own claim); Sandeep Samuel, ISA Level 1 instructor; beginners, non-swimmers, intermediates; Oct–May best for beginners | https://cocopelli.org/ · https://cocopelli.org/surfers.html | loaded |

## 5. Judgement calls and items left off

- **Varkala:** Soul & Surf's Varkala retreat **closed in April 2026** (its own page says so), so it is not listed. Varkala appears via SFI's March 2026 ISA courses there instead.
- **"Kovalam"** exists in Kerala (Kovalam Surf Club) and Tamil Nadu (Covelong Classic venue). The page names the state each time.
- **International Life Saving Federation** (ilsf.org) did not respond to our checker, so it has no card; it's mentioned only through the ISA/ILS course described on ISA's page.
- SFI's list of accredited schools (2024 list page) returned 404, so we **don't claim** any school is SFI-accredited; Cocopelli's recognition claim is attributed to Cocopelli.