Wreck diving, Thistlegorm sunk, 1941 — Section 824: Thistlegorm sunk
Section 824 on Wreck diving pairs “Thistlegorm sunk” with benchmark figure 1911 (1941) for a grounded decision. Sunday night: write 1941 and 1911 for Wreck diving on the slip at the pool. “Thistlegorm sunk” is the condition for Wreck diving. At the bag, the calendar keeps only 1941. Do not reserve a seat for Wreck diving. The slip holds 1911 and Thistlegorm sunk.
Wreck diving is “Thistlegorm sunk” in 1941, and the figure kept beside it is 1911. This week, read one place’s water only, and do not put several seas on one itinerary. Do not write a gear advertisement’s number as the field record. Match only the marked depth to the slip. Wreck diving: At the pool, open Wreck diving so the slip shows 1941 first, 1911 next, and “Thistlegorm sunk” beside them.
This week, before you go to the pool, write that water entry’s name, the year, and the figure on the slip in the bag, and compare them with the depth mark on site. After the swim, write one line on how the marked depth and the figure on the slip differ. The order is Wreck diving, 1941, 1911, then “Thistlegorm sunk”. When the bag is done, look again only at 1941 for Wreck diving and leave 1911 on the slip.
Do not reserve a dive seat or a boat ahead. The slip keeps only the condition of the water. Check that the water on the slip and the place you entered today match, and do not put that figure in today’s cell if they do not. Do not write a gear advertisement’s number as the field record. Match only the marked depth to the slip. Match Thistlegorm sunk with 1911 at the pool before you close 1941 for Wreck diving. Wreck diving is “Thistlegorm sunk” in 1941, and the figure kept beside it is 1911.
This week, before you go to the pool, write that water entry’s name, the year, and the figure on the slip in the bag, and compare them with the depth mark on site. Wreck diving is “Thistlegorm sunk” in 1941, and the figure kept beside it is 1911.1941
Figures to keep
- Reference
- 1941
- Key figure
- 1911
- Topic
- Wreck diving
- Focus
- Thistlegorm sunk
Interactive Scenario & Decision Matrix
Select your current objective to inspect the recommended benchmark, threshold, and verification path.
The depth to respect is {depth}. Access score {access} does not raise it.
Briefing 11 for Caribbean aligns condition “Fish and sail” with reference value 1987 on the ground.
Caribbean: 1987 (2026)Risk mark {risk} means you stay inside {depth}, not past it.
Reading 12 of Caribbean uses “Cozumel and Cayman clubs” and figure 1987 as a checkable baseline.
Caribbean: 1987 (1960s)If you cannot keep {depth}, do not treat {name} as today’s session.
Atlas note 13 on Caribbean defines the operating range of 1987 when “Bonaire Marine Park” applies.
Caribbean: 1987 (1979)Reading 4 of Caribbean uses “Hol Chan” and figure 1979 as a checkable baseline.
Dossier 14 for Caribbean links case “Hol Chan” directly to metric 1979 (1987).
Caribbean: 1979 (1987)United States (US) Institutional & Field Benchmark
US- Primary reference framework
- Coasts and inland water
- Verification standard
- Agency & season access
- Metric & unit convention
- Caribbean · 1987 (2026)
Agency rules, certification agency policy and site conditions decide what is safe — not social videos.
Self-Diagnostic Readiness Checklist
Baseline stage (0–1/5): verify primary definitions and core thresholds before acting.
5-Step Execution & Verification Playbook
- Read the skill mark — Skill ceiling on this hub is {skill}/100 — editorial teaching, not a skills test score.
- Read the risk mark — Risk is {risk}/100 here. It compares topics in the atlas; it is not a live hazard bulletin.
- Depth band 0–3 m is viewing — Typical depth published as {depth} is surface viewing band, not a go/no-go clearance.
- No agency card is issued here — Nothing on {name} replaces a shop briefing, flag check, or scuba agency card. Close if you need certification advice.
- Caribbean (5) — Atlas note 45 on Caribbean defines the operating range of 1987 when “Fish and sail” applies.
Myth vs. Evidence Fact-Check
Are the skill, risk, and depth marks a dive clearance?
No. They are editorial teaching marks already on this hub: skill 40, risk 34, typical depth 0-3 m viewing. The envelope pins last versus this reading. It is not a shop briefing or a safe-today stamp.
What does the 0-3 m viewing band decide?
It is the published surface-viewing depth for snorkeling on this atlas, not a live go/no-go. Current, boats, and park flags sit in the safety chapter.
Do I need a scuba agency card to snorkel?
This hub's quick facts say none required. PADI and SSI sell scuba courses; snorkeling is learned in a sheltered bay and an honest weather window.
What is last versus this envelope for?
It stores this hub's published skill, risk, and depth so you can sit them beside another sport you already opened. Compare marks. Do not treat the pair as clearance.
Domain Jargon & Terminology Decoder
- Agency
- Atlas note 61 on Caribbean defines the operating range of 1987 when “Fish and sail” applies.
- Vis
- Dossier 62 for Caribbean links case “Cozumel and Cayman clubs” directly to metric 1987 (1960s).
- Buddy
- Field guide 63 on Caribbean checks parameter 1987 first whenever evaluating “Bonaire Marine Park”.
- Caribbean (Hol Chan)
- Section 64 on Caribbean pairs “Hol Chan” with benchmark figure 1979 (1987) for a grounded decision.
- Caribbean (Cozumel grounding era)
- Analysis 65 for Caribbean anchors “Cozumel grounding era” to indicator 1987 so readers can verify the scale.
- Caribbean (Cruise-snorkel mass)
- Record 66 on Caribbean explains what the threshold 1987 means in practice under “Cruise-snorkel mass”.
Risk & Failure-Mode Early Warning Radar
- Teaching atlas only. Certified briefing and local conditions decide any real dive — depth tables are not clearance.
- Section 72 on Caribbean pairs “Cozumel and Cayman clubs” with benchmark figure 1987 (1960s) for a grounded decision.
- Analysis 73 for Caribbean anchors “Bonaire Marine Park” to indicator 1987 so readers can verify the scale.
- Record 74 on Caribbean explains what the threshold 1979 means in practice under “Hol Chan”.
Caribbean in 1979: Bonaire Marine Park — Bonaire Marine Park — Section 825: Bonaire Marine ParkNext essayAll 1200 essays1200