Abstract: A core orientator, comprising a body (11) configured to be receivable in a bore hole and to be lowered into the bore hole, the body defining a space (17) which in use is intended to receive a liquid, the space supporting a reference member (23) which is at least substantially supported by the liquid, the reference member having a reference face with a centre, the reference member being weighted such that when the space is at least partially filled by the liquid, the centre will be uppermost, a clamping means (29) adapted to clamp the reference member in position within the space on the lower end of the body being engaged with the bottom of the bore hole.