Tidal  currents

We design tidal stream fields using high sophisticated mathematical models, coastal bathymetrics and GPS based stream measurements.

High resolution tidal stream fields
Grid 100m
Time pattern 30min

GRIB wind

Special GRIB software supplies interface for import of high resolution wind data.

Wind forecast for complete race day
Routing considers forecast of currents and wind
Processes GRIB data from all leading suppliers

Eddy currents

Race Area Analyzer supports eddy currents around some significant points on The Solent. Eddies have been determined by single measurements at

Solent East (Stokes Bay, Stanswood Bay, Cowes East)
Solent West (Hurst Point, Sconce, Cowes West)
Various other coastal areas


Slack waters

Weak tidal currents below 0.1 kts are indicated as slack waters. Race Area Analyzer gives information about slack water times at any supported sailing location.

Integration of slack waters
Times of changing tides
Upcoming currents


Setting courses

On The Solent: by selecting Solent Racing Marks or movable marks in subsequent order.
Other locations (windward-leeward courses): by either editing course data or using gestures on the phone or tablet.

Double tap close to the mark and move mark (Red circle)
Double tap at course center and move whole course
Double tap again to leave mode


Routing beat and run

Race Area Analyzer uses a dynamic grid routing algorithm specially developed for beat and run. It performes routing in detail like boats do it in real. The best routing algorithm until now!

 Individual calculation of best beat- and run courses
 Integration of boat performance data (polar diagrams)
 High resolution routing grid (10m)


Routing reach

Race Area Analyzer calculates reach courses with the well-known Isochronic Grid Method – improved by algorithms to prevent undesired clusters.

 Individual best reach course calculation (Not olympic classes)
 Integration of boat performance data (polar diagrams)
 Isochronic routing grid



Laylines give informations about the influence of tidal currents on the track to the topmark. Race Area Analyzer displays both laylines with and without currents.

Tactical comparison between current and no current
Laylines without currents (yellow lines)
Laylines shifted by stream fields (solid green lines)


Topmark approach

Race Area Analyzer computes the final compass course to the topmark to avoid from under- or overtaking the final track.

Final tack bearing in currents (see dotted line 32°)


Attack angles

When sailing in tidal currents the angle of attack frequently differs from the course over ground. Knowledge of the angle of attack makes the approach of course marks much safer.

Angle of attack in currents (see 34°)


Wind directions

On the boat currents are equivalent to wind. In tidal waters there will be always a wind component caused by currents. Race Area Analyzer computes that wind shift.

True wind (red arrow)
Wind on the boat (white arrow)
Wind shift caused by currents (see +12°)


Tidal gauge

A gauging cylinder gives information about:

High and low tide level
Current level
Indicator falling/rising tide
Here: Tide level = currently 4.6 meter, falling. Max tide level today: 5 meters.
(Only for iPad and notebooks/computers.)

List of boat-classes

Routing is tailor-made for every type of boat.

 more than 950 boat-classes are included
Available boat classes
 if your boat is not listed: we can add
it if you send us the polar data.

Measuring of tidal  currents

High precision measurements of currents with GPS buoys. Supported by CurrentNow technology.

On the RIB we use:

Toughbook computer
GPS transponder
GSP floating measurement bouy


Performance results

Find results also in exact figures in the results-box.
Compare figures of different routes.
Check speed of currents, VMG and other performance data to gain important information for your race, such as:

Advantage of best course
Losses compared to laylines
Best downwind angle
Currents wind shift
Topmark approach
Currents on track
VMG average on track
VMG minimum on track




Boat classes

Race Area Analyzer comes with polars of most cruiser and racing yachts as well as the Olympic classes 2016 and some keelboats and dinghies.

950 cruisers and racing yachts
Olympic classes Rio 2016
Europe, 505, Starboat
Dragon class, J-70, J-80