Decoder — every code on one page

On a phone? Tap any code on any page to pop its meaning. This page is the full list, grouped so you can scan it on deck. Each code links to its detailed definition.

The analysis uses short codes so a glance carries a lot. Three families do most of the work: P1/P2/P3 (when), W-* (what the weather is doing), T-* (what we do about it).

Forecast periods — when

The classifier splits each forecast into three windows; every brief reports a code + confidence per period.

Code	Meaning
P1	Start / coastal leg
P2	Gulf Stream crossing (~+36–48 h from the start)
P3	Bermuda approach (~+70 h)

Weather-type codes (W-*) — what the weather is doing

Full profiles in the Weather Analog Framework.

Code	Meaning
W-BH	Stable Bermuda High / reaching race — steady SW–WSW gradient
W-PF	Pre-frontal southerly → post-frontal northerly transition
W-LA	Light-air start with offshore compression
W-CF	Strong cold front crossing the fleet — dominant problem when present
W-SQ	Gulf Stream squall / convection risk — elevated CAPE over warm water
W-RC	Rhumb-line-favored current — no strong case to go east or west
W-AC	Adverse Stream crossing requiring a detour
W-CC	Cold-core ring opportunity — commit only with SST + altimetry + RTOFS agreement
W-WE	Warm-core eddy trap — generally avoid
W-BS	Late-race Bermuda approach shutdown
W-PL	High-pressure "parking lot" south of the Stream — light, current-decisive

Routing tactics (T-*) — what we do about it

Full profiles + Lupo applicability in the Routing Tactic Catalog.

Code	Meaning
T-CL	Conservative Lane (Lupo's default) — minimize maneuvers
T-RH	Rhumb-line hold — stay on/near the great circle
T-WR	West route — dodge adverse Stream / find a favorable meander
T-ER	East route — better pressure or exploit a Stream bend
T-PF	Pressure first — optimize wind; current secondary
T-CF	Current first — route toward favorable Stream (needs SST + altimetry)
T-EC	Early crossing — cross north of the rhumb crossing latitude
T-LC	Late crossing — cross south of the typical latitude
T-NW	North-wall hug — follow the north wall to maximize current
T-CCR	Cold-core ring exploit — only with SST + altimetry + RTOFS agreement
T-WCE	Warm-core eddy avoid — dodge a WCE south of the Stream
T-ME	Meander exploit + exit — ride a meander; pre-plan the exit latitude
T-RR	Ridge ride — align with the Bermuda High ridge axis
T-RL	Ridge left (west) — west side of the ridge for stronger pressure
T-RR2	Ridge right (east) — east side for a better angle to Bermuda
T-LA	Light-air gamble — push through light banking on pressure beyond
T-FR	Front timing — be on the favorable side of a front

Polar degradation scenarios (S-*) — how slow we plan

How much we discount Lupo's certificate polar for real offshore conditions. S* are planning speeds, not sails. Rationale and race-week calibration in Polar Degradation Scenarios.

Code	Meaning
S0	Cert baseline — flat-water, full-crew VPP, no degradation. Not used for this race (no measured on-water data to support it)
S1	5% degradation — crew knows the boat, fresh bottom, recent racing. Not applicable this race
S2	8% degradation — previous default; use after race week once crew has boat-time
S3	10% degradation — current planning default. New boat to crew, no measured baseline; used for all routing runs, elapsed estimates, provisioning
S4	15% degradation — unfamiliarity + heavy air + tired crew. Stress test (first 24–36 h, Stream heavy air); if a strategy fails at S4 it's genuinely fragile

Ocean & Gulf Stream

Physical structure in the Gulf Stream Framework.

Term	Meaning
CCR	Cold-core ring — detached cold eddy off the north wall; counter-clockwise, favorable on its western limb
WCE	Warm-core eddy — warm clockwise eddy south of the Stream; generally avoid
SST	Sea-surface temperature — primary signal for locating the Stream, rings and the north wall
SSH	Sea-surface height — altimetry anomaly; lows = cold-core features, highs = warm eddies
North wall	The sharp northern temperature/current boundary of the Stream

Models & data

The Sources & Tools catalog links every one.

Code	Meaning
GFS	Global Forecast System — NOAA's global weather model
ECMWF	European Centre for Medium-Range Weather Forecasts model
ICON	DWD (German) global weather model
RTOFS	Real-Time Ocean Forecast System — NOAA ocean-current model; model-only, confirm with SST + altimetry

Risk & navigation

Code	Meaning
H-HR	High-risk / high-reward — a feature forecast but not confirmed by two independent sources; Lupo does not commit
VMG	Velocity made good — speed of progress directly toward the mark
MSLP	Mean sea-level pressure
CAPE	Convective available potential energy — thunderstorm / squall fuel