Sailing yachts

Ranzo Class 4 tonner

(REF: 18139)


  • Designer: Blake, Maxwell
  • Builder: Robertsons of Woodbridge
  • Year: 1936
  • Location: Suffolk
  • Length on deck: 22'
  • Beam: 7'2"
  • Draft: 3'

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Full specification

Wooden Ships Comments on this Ranzo class 4 tonner

The Ranzo 4 tonner was one of a host of small boats that emerged following the depression of the 1930’s allowing a generation of sailors to go back to the sea.

Built by Robertson’s boat yard in Woodbridge around 1936 to a design by W.Maxwell Blake.  The Ranzo was the predecessor to the better known Deben 4 tonner and is a very similar boat in many ways.

This boat had a major refit in 1995 and a copy of the survey done after the refit is available.

Ranzo Class 4 tonner

Length on Deck           22’

Length Overall                        24’6″

Length Water Line      19’

Beam                           7’2

Draft                            3’





Believed to be pitch pine planking on grown oak frames with steamed intermediate timbers all copper rivet fastened.  Oak keel, deadwoods and stem and stern posts

Galvanised iron strap floors

Iron external ballast keel with iron keel bolts.  5 replaced in 2010 with the other 3 replaced several years before.


Decks and Cockpit

Marine plywood deck sheathed in epoxy with varnished toe rails and rubbing strake.


Non self draining cockpit with varnished thwarts.  Iroko rudder and tiller (’95).



Varnished teak coamings with bronze port holes.  Sheathed plywood coachroof deck with varnished handrails




Gaff sloop rig with keel stepped solid wood varnished mast and boom. Plastimo furling system on the headsail.


Stainless steel  standing rigging replaced 1997.  External bronze chain plates with lanyards.


Main and Jib new 2014 made by Steve Hall, North Sea Sails, Tollesbury Essex.  Slab and roller reefing on the boom.






Bukh DV10 10hp single cylinder diesel engine installed approximately in 1985.  Stainless shaft with 3 blade bronze propeller on the centreline.

Cruising speed 4knots top Speed 5knots


2 x 12v Batteries (new 2015) charged by alternator which has been recently replaced.



1 x 5 Gallon stainless steel fuel tank





Berths  2/3

2 berths in one cabin, twin settee berths, one of which converts to a small double.  Sea toilet in the forepeak.




Plastimo steering/hand bearing compass

Seafarer echo sounder

1 manual Bilge pump, 1 electric bilge pump

CQR Anchor with Chain and warp (60ft Approx)

Ropes and Fenders


These particulars have been prepared in good faith from information provided by the Vendors and are intended as a guide, Wooden Ships cannot guarantee or warrant the accuracy of this information nor warrant the condition of the vessel. The Purchaser should instruct his agent or surveyor to validate all details as necessary and satisfy himself with the condition of the vessel and its equipment.