https://babel.hathitrust.org/cgi/pt?id=mdp.39015081885843&view=1up&seq=40
Media
Google Books
1915 USNO England East Coast Pilot
Thanks to https://thames.me.uk/sailing1817.htm and on Google \books FROM THE NORE THROUGH THE SWIN AND KING’S CHANNEL TO HARWICH AND ORFORDNESS. 1817: Description of the Buoys and Beacons, from the Nore through the Sledway to Orfordness Shoebury-knock buoy. No. 1, blacklies in 3 fathoms to be left on the larboard side […]
1817 Norie Sailing Directions Nore to Orfordness
Available as a book or on Google Books.
2004 The Essex Coastline then and now
The Mariner’s Mirror podcast has now launched from the SNR. First episode is promising and this should be a good series. No annoying ads so far.
Mariner’s Mirror podcast
Chartlets from 2010 to 2020 apart from 2012, and no survey in 2020 due to COVID.
Deben Entrance year by year
French site with lots of material not yey explored.
Free Nautical Charts
Needs to be seen on paper – large.
Deben map by Simon Read
Several theories for this. Most convincing is here (wikipedia agrees) and says there is a cone of backwash going forward over the hull. This causes pressure on the starboard hull side and suction on the port (RH prop) thus imparting an aerofoil effect, albeit in the horizontal plane, which causes […]
Propellor Walk
Available on Hathitrust The Way of a ship
1937 The way of a ship; an essay on the ...
Here are the two Furled Sails podcasts where Marvin Creamer describes the techniques he used for his voyage. He estimated the altitude of stars at meridian passage to establish latitude. This means estimating the Zenith, position, Zenith angle and when the star is on the meridian. Sounds tough! There is […]
Circumnavigation with no instruments
Go to Orwell School and turn left, follow sign to Picnic Site. Parking at this site is good and free. Room for 20+ cars. There is a 2.4m height restriction if the barrier is in place (not locked last time). Not far to the shore. The shore is shallow so, […]
Nacton Shore
First British Navigation Manual. Full text. How to do navigation.
1574 “A regiment for the sea” William Bourne
Includes the Deben and some notes on distances. See here.
1635 Mercator Atlas of the World
History here and online maps here.
Soviet Maps
Full text on HathiTrust. A good description of bars and sandbanks and other features from the surveyor of the 1845 Deben Survey.
The conservation and improvement of tidal rivers by Edward Killwick ...
Extensive, need to pay.
L Brown Map Digital Collection
https://suffolkinlets.wordpress.com/
Suffolk Inlets
Here
1752 Thames Chart
By Captain Washington. 1852 A new chart of the River Thames. With its entrances
1852 A new chart of the River Thames. With its ...
The least depth is 1.9m between halfway point and Swin Spitway SWM. Really want 3m least which needs a Walton tide of 1.6m for comfort, 1.1m if calm. It seems to shelve gently, safer water to the east. Likely to be worst when going South so at Wallet Spitway we […]
Swin Spitway
Source: Survey Open Data
Survey Open Data
For planning and reducing Stars the “249 vol 1 Air Tables Seven Stars all latitudes” is used, work out the LHA for the given time by adding the GHAaires to the Longitude and use that to enter the table for the appropriate latitude. This will tell you which stars to […]
Sight Reduction Tables for Celestial Navigation
Excellent sight reduction for Sun, Moon, Planets, Stars. Software. LONG-TERM ALMANAC FOR SUN, MOON, AND POLARIS via Almanac. Umland’s free ebook is superb, on the same site.
Online sight reduction utilities
For sorting out what the astronomical time is, delta T etc. IERS Rapid Service/Prediction Center for Earth Orientation.