solving tracks…
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RaceAtlas
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Race Controls
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Course
no marks
＋ Set marks
Save
Clear
Load saved…
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set start & windward mark
Conditions
Wind
°
Speed
kt
Tack
°
Current effect
— off = still water
Scenario
Split Tack
Same Tack, Opposite Ends
Tack on Intervals
Shore Relief vs Open
Bay Tour Options
Manual Tracks
Split — up the beat before tacking
35%
Tack
auto (toward mark)
starboard
port
Line length
8 BL
Bias
0° square
Sail time
5 min
Tack every
min
When they meet
hold side (tack back)
cross over
Shore side
auto-detect
left
right
Number of tracks
3
✎ Adjust these tacks
Lay your own tracks — each click drops a tack. Draw several to compare how to play it.
✎ Draw
＋ New track
↶ Undo
Clear
⚓ Split Tack
Result
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Regattas
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‹ back to regattas
Fetch
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Date
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today
Time
◉ live
tide (SF) · current (Golden Gate)
▸ times
✕ hide
▸ show tide & current table
Tide
‹ 15
15 ›
◉ now
⟳ flood
⟳ ebb
▸ analog cycles
Race
▶
1×
2×
4×
8×
16×
ladder
— set a course to play the race —
current (kt)
0
→
3.2+
N
270°
Display settings
✕
New layout
— two bars instead of floating panels
Show my location
Arrow spacing
Arrow length
Arrow opacity
Arrow weight
Hide below
Field opacity
Hover tooltip
Tooltip arrow
on the edge
inside box
Depth contours
Depth units
meters
feet
fathoms
Map theme
dark
satellite
nautical chart
light
reset to defaults
Map data ©
CARTO
, ©
OpenStreetMap
contributors
Controls
Result
Tide
Race
Regattas
Coach
clear
✕
Answers from the live current, tide & your last run. Tap a question or ask your own.
What’s the current doing?
Which side pays?
What’s the best track?
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↻ Replay the guided tour
Skip tour
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◤
Welcome to RaceAtlas
The San Francisco Bay tidal-current atlas & racing-tactics simulator.
Ask the coach a question — it’ll set up the course and answer it.
〜
What’s the current doing?
See the live tidal field & how it builds over the tide.
⚓
Which side pays?
Run two boats — see which side wins, in boat lengths.
⤳
What’s the best track?
Compare land-avoiding routes to the mark, ranked by time.
▶ Take the 60-second tour
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Explore on my own
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Keep running the tactics — the current & tide stay open either way. It’s free and takes a moment.
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Help & support
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Still stuck?
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Race controls, result, tide & race
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