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ONBOARD CARD 03 - Pre-Gulf Stream Approach

Phase: Final 50–100 nm before Gulf Stream north wall entry Typical elapsed time: Race start +20–35h depending on conditions

UNFAMILIAR BOAT NOTES - READ THIS FIRST

This crew is racing Lupo Di Mare together for the first time. The following protocols are adjusted for that reality.

1. The 50-nm window before Stream entry is the last chance for a calm sail change - use it. Once you cross the north wall, conditions change: chop increases, wind can be confused, and squall risk rises. If you are on a sail that is not right for the crossing, make the change NOW while you still have sea room and relatively settled conditions. A sail change in the Stream is a sail change on an unfamiliar boat in difficult water. Do not carry a questionable sail into the Stream because you didn't want to deal with it beforehand.

2. Brief ALL crew on the Gulf Stream - not just the on-watch. If any crew member does not know what the Gulf Stream is, what it looks and feels like, or what the risks are, tell them now. Wake everyone up for this brief if necessary. The Gulf Stream is not a normal offshore passage segment - the SST jump, the current, the chop, and the squall corridor are all different from what came before. Every person on this boat should know what they are sailing into before you enter.

3. Pre-assign every role for the Stream crossing before you enter. Before the north wall, lock in: who is on the helm, who is trimming the mainsail, who is trimming the headsail or kite, who is on radar, and who is on instruments calling pressure and direction. Do not figure this out after you are inside. An unfamiliar crew improvising roles in Stream chop at night is how maneuvers break down. Write the assignments down and brief the crew.

4. Make sure everyone has eaten and can eat - seasickness is common in Stream chop. Stream conditions hit a crew that is already 20–30 hours into the race and potentially fatigued. The combination of short steep chop, motion change, and possibly different smell (hydrogen sulfide in some current eddies) can trigger seasickness in crew who were fine offshore. Force everyone to eat and hydrate in the 2-hour window before entry, and ensure anti-nausea medication is available. A sick crew member in the Stream is a watch-strength problem.

5. If the squall drill has not been practiced in race week, do it now. The 50-nm window is the last opportunity to run through the squall protocol before entering the highest-risk squall corridor of the race. At minimum, confirm everyone knows: what radar threshold triggers a kite douse, who makes the call, who executes it first, and what the default sail is after a squall response. For this crew, if in doubt, the default is: kite down, reef #1 in, all hands clipped, navigator on radar watch. No discussion required once the threshold is crossed.

PRIMARY OBJECTIVE

Arrive at the Stream entry latitude with the correct sail, a clear read on current position, and the crew briefed and rested for the Stream crossing.

DATA TO CHECK

At 100 nm from planned crossing latitude: - GPS/log current vector: is the shelf edge current helping or hurting? - Wind: is the gradient matching the forecast for the crossing window? - Pre-loaded SST overlay: is the north wall where expected?

At 50 nm from planned crossing latitude: - Confirm entry latitude plan: is this still the right call based on current Stream position? - Confirm crossing wind forecast: what will the wind be doing when you hit the wall? - CAPE check (if GRIB loaded with convective indices): squall risk in the corridor? - Crew status: who is rested and who is not? Plan the strongest watch for the crossing.

Run all of the following before crossing the 50-nm threshold:

  • [ ] Pull latest SST overlay (Windy SST, PredictWind SST, or NOAA GOES composite): confirm north wall latitude at your crossing longitude - has it moved since the pre-race brief?
  • [ ] Pull latest model wind for the crossing window: ECMWF and GFS, verify they agree within 5 kts; note if convection is forecast in the Stream corridor
  • [ ] Confirm GPS/log SOG vs COG delta: measure actual current set at your current position to validate Stream north boundary estimate
  • [ ] Check for Loop Current eddy positions: warm-core eddies ahead of or behind the main wall can add 1–2 kts of favorable set if you route through them; cold-core eddies subtract
  • [ ] Review SST at your planned exit latitude (south wall): confirm exit into the Sargasso is clear of unexpected eddies
  • [ ] Calculate ETA at Stream north wall under current conditions: brief skipper on timing (day or night crossing?)
  • [ ] Log current Stream crossing plan with: entry latitude, exit latitude, wind forecast for crossing, expected sea state, and any contingencies if conditions are different from plan
  • [ ] Brief skipper and watch captains on the above before entry

TRIM / SAIL IMPLICATIONS

  • Get reef #1 set in the mast (pre-rigged) before entering: it should be there throughout the crossing
  • Choose the sail you intend to carry through the crossing and set it before you enter
  • Avoid arriving at the Stream mid-sail-change or during a peel
  • For Lupo Di Mare's inventory: The Code 65 is a furling code zero (rolls on sprit - faster to deploy/recover). The J-sails (J1, J2, J3, J4) run up the forestay track and are not furling - a J-sail change requires removing the existing sail and rigging the new one at the bow. Plan accordingly: if there is any chance you will need J3 inside the Stream, transition to it in the 50-nm approach window, not inside.

CREW PREPARATION

Sleep scheduling before the Stream: Begin managing sleep rotation at 100 nm out so that the strongest watch is available for the crossing. Identify who needs rest before the Stream entry and protect that rest now. Do not allow crew who will be needed for the crossing to stay up watching a routine offshore sail plan.

Watch assignments for the crossing: Before the 50-nm threshold, confirm which watch is leading the Stream crossing. The crossing watch should be: the helmsman most comfortable in chop, the most experienced trimmer on the kite or main, and at minimum one person who has crossed the Stream before (if available). Assign a backup to every role so that fatigue-related substitutions do not disrupt the plan.

Pre-brief on what the Stream looks and feels like: Many crew on Lupo Di Mare may not have seen the Gulf Stream before. A short brief before entry: the water temperature rises sharply (sometimes 10°F in a mile), the water color changes from blue-grey to vivid deep blue, the chop pattern changes as current runs against wind, boat motion can become confused and uncomfortable quickly, and squall cells build and move faster than they do offshore. This is not dramatic - it is just different from what came before, and it helps to know it is coming.

Physical preparation: Before Stream entry, all crew should: eat a full meal, drink water, take any anti-seasickness medication that needs 1–2h to take effect, and use the head. Harnesses should be on and accessible. Tethers should be clipped to the jacklines at the dock. Confirm all crew have their harnesses on before crossing the north wall.

Squall protocol review: Review Card 09 (Squall Response). Confirm every crew member knows the trigger threshold, who calls it, who executes first, and what the default post-squall configuration is. For this crew on this boat: if there is ANY radar echo within 30 nm to W–SW–NW while in or near the Stream, the default response is kite down, reef #1 in, all crew clipped - no discussion. Practice the callout sequence before entering.

WHO GETS WOKEN UP

  • Navigator: at 50 nm from planned entry latitude
  • Skipper: if entry plan has changed significantly from pre-race brief
  • All crew: for the Stream entry brief, at no later than 2 hours before the north wall

PRE-RACE RESEARCH - NOT race-period routing advice