TSS separation zone coordinates need verification against official IMO/CFR sources

[SL-Mar]

Problem

Most TSS separation zone polygons are incorrectly positioned on the map. Only Gibraltar and Finisterre (sourced from COLREG.2/Circ.58, Circ.66, and A.957(23)) render correctly. The remaining separation zones use approximate or derived coordinates that do not match their real-world positions.

Current status

TSS	Status	Accuracy
Strait of Gibraltar (2 zones)	DERIVED from Circ.66 centerlines	Correct
Off Finisterre (4 zones)	VERIFIED from A.957(23)	Correct
Off Ushant	VERIFIED from Circ.58	Needs visual check
Galveston Bay	VERIFIED from 33 CFR 167.350	Needs visual check
Off San Francisco (3 zones)	VERIFIED from 33 CFR 167.402-404	Needs visual check
Dover Strait	DERIVED	Wrong position
Off Casquets	APPROX	Wrong position
Strait of Hormuz	APPROX	Wrong position
Off Cabo de Gata	APPROX	Wrong position
Off Cape Spartel	APPROX	Wrong position

Required action

For each incorrectly positioned separation zone:

1. Obtain exact coordinates from official publications:
   • IMO COLREG.2 Circulars (ship's routeing amendments)
   • IMO Resolution A.572(14) and amendments (General Provisions on Ships' Routeing)
   • 33 CFR Part 167 (US waters)
   • UK Hydrographic Office Admiralty Sailing Directions
   • National maritime authority GIS datasets
2. Replace approximate polygons with verified coordinates
3. Update sep_status in TSS_METADATA to VERIFIED
4. Update verified date field

Files

• src/data/tss_zones.py — TSS_SEPARATION_ZONES dict and TSS_METADATA
• src/data/regulatory_zones.py — zone registration
• api/routers/zones.py — /api/zones/tss-reference endpoint

Notes

• Banco de Hoyo TSS was removed entirely (no official polygon data available)
• Traffic lane outer boundaries are hidden on the map — only separation zones render (solid magenta per IMO convention)
• 12 TSS zones have no separation zone data at all (status: NONE) — these are lower priority but should eventually get polygons