Transparency Report
How We Calculate the Trust Score
The diving industry has no universal public safety index. ScubaProof fills that gap with a weighted, transparent algorithm built around the metrics that matter most when something goes wrong underwater.
7,000+
Dive Centers Analyzed
8,000+
Dive Sites in Database
0
Sponsored Rankings
The Formula
Clamped: 1.0 ≤ score ≤ 5.0
Pillar 1
Safety Infrastructure — 50%
Safety carries the highest weight because DAN (Divers Alert Network) Annual Diving Reports consistently identify inadequate supervision and emergency response as the leading factors in preventable diving fatalities. The 50% weight reflects causation data, not opinion.
Emergency readiness
Availability of onboard O₂ first-aid equipment, proximity to a hyperbaric (recompression) chamber, and whether divemaster-level or higher staff are present on every dive. A center without documented emergency oxygen is a center that has already failed one critical safety check.
Instructor-to-diver ratio
WRSTC (World Recreational Scuba Training Council) guidelines recommend a maximum 8:1 for Open Water courses and 4:1 for Discover Scuba Diving programs. Centers consistently reported to exceed these ratios receive a Safety sub-score penalty.
Dive briefing quality
Site-specific hazard briefings — current direction, thermocline depth, maximum bottom time, lost-diver procedure, and emergency hand signals — are a baseline standard, not an optional extra. Reviewers who mention skipped or perfunctory briefings flag a structural gap.
Incident transparency
Centers that acknowledge near-miss events and describe corrective action score higher than those with suspiciously perfect records. Silence about incidents is not a safety signal — it is an absence of one.
Pillar 2
Staff Quality — 30%
A PADI 5-Star IDC or SSI Diamond certification is a necessary signal — not a sufficient one. Agency accreditation verifies that minimum standards were met at some point; reviewer patterns reveal whether those standards are maintained dive by dive. Staff sub-score captures the gap between credential and conduct.
- Active certification status with PADI, SSI, TDI, CMAS, or NAUI — and whether renewal is current
- Language coverage: instruction available in the diver's primary language (miscommunication is a documented contributing factor in underwater incidents)
- Consistency of pre-dive safety checks described across independent reviews
- Transparency about instructor qualifications when asked directly
Pillar 3
Gear & Equipment — 20%
Equipment failure is less common than human error but disproportionately catastrophic. Regulators, BCDs, and dive computers have documented service intervals. Centers that maintain and communicate these intervals — and whose rental equipment is consistently described as well-maintained — receive higher Gear sub-scores.
- BCD, regulator, and dive computer condition reported across multiple reviews
- Servicing transparency: whether annual overhaul schedules are mentioned or available on request
- Nitrox (EAN) availability and whether EAN certification is required before use
- Rental wetsuit fit — an under-discussed comfort and thermal safety factor, especially on deep or night dives
Automatic Penalties
Red Flag System
Red flags are score penalties derived from diver-written reviews. Our AI reads what reviewers wrote and classifies specific phrases into structured safety signals — it does not rephrase, summarise, or invent. The output is always traceable to a real sentence in the source review.
Reports of unresponsive emergency procedures, equipment failures during active dives, instructors skipping mandatory safety stops, or one instructor simultaneously supervising multiple uncertified student groups.
Recurring mentions of poorly maintained rental gear, inconsistent or absent pre-dive briefings, language barriers causing confusion about dive plans, or non-disclosure of current strength and depth conditions.
A center with two critical flags has a maximum attainable score of 3.4 / 5.0, regardless of other ratings. Any score below 3.0 is labelled Under Review — visible on all search results and the center's profile.
Data Sources & Freshness
Time-Decayed Community Data
Scores are computed from aggregated ratings and review patterns sourced from Google Maps, combined with structured dive-community data. Reviews are time-weighted on a three-year sliding scale:
1.0×
0–12 months
0.5×
13–24 months
0.2×
25–36+ months
Management, staff, and equipment change. A difficult season three years ago should not permanently define a center that has since improved — nor should a historically strong record mask a recent decline.
Transparency
What the Trust Score Does Not Measure
- —Dive site quality: current strength, visibility, marine life density — see our Dive Sites section for site-specific data
- —Value for money or price-to-quality ratio
- —Social atmosphere, group dynamics, or "vibe"
- —Real-time conditions — currents, thermocline depth, and visibility change daily; always verify directly with the center before booking
- —Liveaboard-specific protocols: overnight vessel safety, seasickness management, or mixed-gas technical diving infrastructure
Independence Statement
No ranking can be purchased or influenced.
ScubaProof does not accept payments, sponsorships, or promotional arrangements from dive centers or dive agencies. No operator can request removal of a red flag, adjust their score, or purchase prominent placement in search results. The algorithm runs on the same rules for every center in the database.
The Human Element
Born in the Nitrogen. Built in the Cloud.
About the team behind ScubaProof
ScubaProof was built by divers who got tired of making critical safety decisions based on star ratings that reward cafeteria food and boat Wi-Fi. We set out to solve what we call the blind trust problem: the gap between a center's marketing and what actually happens at depth.
Most dive aggregators optimize for affiliate commission. We optimized for the question you ask yourself before every dive: "Do I trust this center with my life?"
Alexey BalakhanovPADI Advanced Open Water Diver
Co-founder of ScubaProof. Software engineer and active diver who got tired of making critical safety decisions based on star ratings that reward cafeteria food and boat Wi-Fi. Built this platform to surface what subjective reviews cannot.
AI ScoutZero-Generative
A Gemini-powered pipeline that reads diver-written reviews and extracts structured safety signals from them. It does not rephrase, summarise, or invent — every flag it raises traces back to a real reviewer's sentence.
The Community
Thousands of divers whose honest reviews — on gear condition, depth ratios, and briefing quality — form the raw signal that no marketing budget can drown out.
DAN-Aligned
Safety weights
No Sponsorships
Pure rankings
Open Methodology
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