A locking gimbal for automatically locking a gimballed object against motion arising from an external force applied thereto, the locking gimbal comprising: a first object pivotally connectible to a support , and being pivotable about a first pivot axis (P F ), wherein the centre of gravity (CG F ) of the first object is spaced from the first pivot axis (P F ), and further wherein the first object defines a first reference axis (A RF ) passing through the first pivot axis and the centre of gravity of the first object; a second object having a centre of gravity (CG S ) movable along an arc centred substantially at a second axis (P F ) and defining a second reference axis (A RS ) passing through the second axis and the centre of gravity of the second object, the first and second objects being movable relative to one another between a first aligned condition, wherein the first and second reference axes are substantially aligned, and a second displaced condition, wherein the first and second reference axes are angularly displaced relative to one another; a locking member fixed in position relative to the support; a connector , having a first end connected to a locking formation and a second end connected to the second object, wherein pivotal displacement of the first object relative to the second object to the displaced condition in a first direction drives movement of the connector, consequentially forcing at least a portion of the locking formation from a disengaged position to an engaged position, wherein the locking member arrests further pivotal displacement of the first object in such first direction via the locking formation; characterised in that the locking formation is operatively movable relative to both the first and the second objects. a first object pivotally connectible to a support , and being pivotable about a first pivot axis (P F ), wherein the centre of gravity (CG F ) of the first object is spaced from the first pivot axis (P F ), and further wherein the first object defines a first reference axis (A RF ) passing through the first pivot axis and the centre of gravity of the first object; a second object having a centre of gravity (CG S ) movable along an arc centred substantially at a second axis (P F ) and defining a second reference axis (A RS ) passing through the second axis and the centre of gravity of the second object, the first and second objects being movable relative to one another between a first aligned condition, wherein the first and second reference axes are substantially aligned, and a second displaced condition, wherein the first and second reference axes are angularly displaced relative to one another; a locking member fixed in position relative to the support; a connector , having a first end connected to a locking formation and a second end connected to the second object, wherein pivotal displacement of the first object relative to the second object to the displaced condition in a first direction drives movement of the connector, consequentially forcing at least a portion of the locking formation from a disengaged position to an engaged position, wherein the locking member arrests further pivotal displacement of the first object in such first direction via the locking formation; <EOS>