lockmaster
Controls water levels
A lockmaster is the person who operates a canal lock, controlling the gates and water levels that allow boats to move between sections of waterway at different elevations.
The position combines mechanical operation with traffic management, coordinating vessels through what amounts to a water staircase: The lockmaster signaled us to enter the chamber.
Navigable route for vessels
- sluiceGated water conduit
- gateHinged barrier in fence
- bargeFlat freight vessel
- narrowboatSlim vessel for canals
towpath · weir · navigation · chamber · pound · canal · reservoir · water level
Restricting resource availability selectively
- safeguardPrecaution against harm
- vaultSecure storage chamber
- gatekeeperOne controlling entry
- protectionGuarding against harm
barrier · entry · restricted · clearance · authorization · lockout · breach · secure
waterway
Navigable route for vessels
narrowboat · towpath · weir · navigation · chamber · pound · canal · reservoir · water level · downstream
access control
Restricting resource availability selectively
- safeguardPrecaution against harm
- vaultSecure storage chamber
- gatekeeperOne controlling entry
protection · barrier · entry · restricted · clearance · authorization · lockout · breach · secure · tamper-proof
tumbler
Flat-bottomed drinking vessel
deadbolt · latch · bolt · shackle · cam · spring · lever · escutcheon · spindle · faceplate