[0%] Direct GC = Straight line (check ECDIS GC)
[1-3%] Short leg <50NM = Pilot to pilot, anchorage to berth
[5-7%] Open Ocean = Few WPT, clear ocean - Pacific, S. Indian, 20°N Oman (Duqm)
[8-10%] Ocean + TSS = Most voyages - Gulf of Oman UAE 8%, Moroni/Comoros 9%, Arabian Sea
[12-15%] Coastal/Restricted = Malacca, English Channel, Aegean, archipelago

--- YOUR PICKUP POINTS ---
[Galle & Colombo, SL] = 7-8% (Galle 8% / Colombo 7% coastal)
[Near Maldives] = 6-7% (open but avoid atolls - use 6%)
[Gulf of Oman - UAE] = 8-10% (Fujairah 8% / Hormuz 10%)
[20°N Oman - Duqm] = 5-6% (open Arabian Sea - use 5%)
[Red Sea 20°N - Jeddah] = 10-11% (middle Red Sea - use 10%)
[Suez - Gulf of Suez] = 12% (narrow TSS + many turns)
[Moroni / Mozambique Channel] = 8-10% (islands - use 9%)
[South Africa - Cape] = 6-7% (Cape rounding 7% / coastal 9%)

WGS84 R=6371.0088km = 3440.065 NM. LMT = UTC + Lon/15. Works worldwide, no fixed zone. V7 Independent.