Nautical

These items are of a more general nature and mostly relate to the “Age of Sail”.

Air pressure, Sea Level and Surges

Essentials Standard air pressure at sea level is 1013 millibar (mb). +1mb air pressure depresses ...

Bearings Relative to the Boat – Points

A method is needed for crew to communicate bearings of the wind and objects relative ...

Collision Regulations

Great Britain has led the World in many things, mostly good: maritime safety is but ...

Confused helm instructions

Robert Fitzroy had overcome the confusion caused by "Larboard" and led the change to using ...

Elevation and Depth data

Also see Walton on the Naze tides - variation LIDAR is a Laser-based surveying technique ...

Felixstowe sea temperature

From Channel Coastal Observatory graph showing temperature range by month for 2018-2020 data. MonthDegrees CJanuary6.7February6.1March7.6April9.7May12.6June16.2July18.4August19.9September17.6October14.3November9.9December7.7 ...

GPS-GOTO vs CTS

It is easy when sailing to set the GPS system to GOTO waypoint and then ...

HHA Tidal Surges

14AUG24 there was a surge, it built up very quickly as can be seen from ...
Circa 1800 Log and Line with glass - available on ebay but expensive.

Knots by Log and Line

We use knots as a measure of speed on the water. How does this work, ...

Log Calibration

A yacht's log records the distance travelled through the water and, from that, derives speed ...

Port and Starboard

Once we've realised that Port is on the left only when facing the pointy end ...
The Count of the Saxon Shore

Roman Weather Lore

A fictionalised account of the departure of the legions from Britain is given in the ...

Sea Words And Phrases Along The Suffolk Coast- Edward Fitzgerald

Fitzgerald collected words and phrases from local sailors and fishermen which were published in the ...

Sounding by lead and line

Acoustic depth sounders appeared in the twentieth century, earlier for ships than yachts. However, from ...

SYH Berth Survey June 2022

As part of a plan to survey sections of the marina for depth, it was ...

Tide and Wave predictions and data

Tide Predictions Harwich Haven Authority/Leisure produces annual tide tables as well as a tidal atlas ...

Walton on the Naze tides – variation

Also see Elevation and Depth data. Walton on the Naze is the standard port for ...

Watches, Bells and the Ships Day

In the "Age of Sail" at sometime after seven bells in the forenoon watch a ...
1836 Nories tables compass card

What’s the Point of a Compass?

The magnetic compass has developed, not as quickly as one might think, over the last ...
Squire Thornton Stratford Lecky , 1917 edition of Wrinkles, explains tides and instruments, lovely language.

Wrinkles in practical navigation by Captain S.T.S.Lecky

Squire Thornton Stratford Lecky had an interesting career Lecky, Squire Thornton Stratford | Dictionary of ...

Notes

Questions

Sources

Footnotes

Image Sources and Credits

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