(A Typical Calder & Hebble Navigation Lock)
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A Typical Calder & Hebble Lock
Note that this lock has mechanical ground sluices - see below
and 'handspike' gate sluices (paddles)
A Typical Calder & Hebble Lock Ground Sluice (Double Sided)
Remember to put the safety pawl on when winding up
and WIND down (do not drop down)
A Mechanical Calder & Hebble Lock Gate Sluice (Paddle)
Some are hydraulic - some are 'hand-spike'
Remember to put the safety pawl on when winding up
and WIND down (do not drop down)
An Original Calder & Hebble Lock Gate Sluice (Paddle)
Hand-Spike Operated - with Safety Pawl
Some are mechanical - some are hydraulic
Some ground sluices are also hand-spike operated - just above the lock head
Use them BEFORE gate paddles - or you may flood your boat !