Document ID: chunk:federal_register_of_legislation:F2022L01461:reg:2027:p2
Version: federal_register_of_legislation:F2022L01461
Segment Type: reg
Provision Reference: reg 2027 (pt 2/9)
Character Range: 124231–126988

and is distinguished from restoration by the introduction of new material.
Related object means an object that contributes to the cultural significance of a place but is not at the place.
Related place means a place that contributes to the cultural significance of another place.
Restoration means returning a place to a known earlier state by removing accretions or by reassembling existing elements without the introduction of new material.
Setting means the immediate and extended environment of a place that is part of or contributes to its cultural significance and distinctive character.
Use means the functions of a place, including the activities and traditional and customary practices that may occur at the place or are dependent on the place.

Appendix 2. Glossary of historic lighthouse terms relevant to Mersey Bluff Lighthouse
A
Apron paving – concrete paving surround the base of the lighthouse tower.

Astragal – bars which support the glazing of a lantern. They may also support the roof. Simply a framing member between the glazing bars in the lantern glazing. In its true meaning an astragal is a moulding that has a rounded profile. In lanterns this is almost never the case.

B

Balcony – walk way around the outside of the lantern, used for maintenance and (formerly, when lighthouses were manned) for observing ships. Principal parts are the balcony floor and the balcony balustrade.

Balcony floor – floor of the balcony. Mersey Bluff's balcony floor is of 1889 sandstone slabs.
Balcony balustrade – handrail together with its supports. The supports are called balusters. A railing or wall on the outer perimeter of a balcony, to prevent people from falling off the balcony. Generally made of metal stanchions and rails, Mersey Bluff is fitted with 1889 wrought iron balustrades.
Balcony door – door in the lantern base to give access to the balcony.

C

Character – pattern of flashes of light emitted by a lighthouse, designed to identify that particular lighthouse.

F
Flagpole – structure whereby signalling flags could be attached for communication with passing vessels.

G

Glazing bar – rebated bars of metal which retain the panes of glass in a window. Often consist of vertical angled steel members joining between done support ring and murette. Often the glazing bar has a tenon that matches a mortise in the murette. Astragals are arranged helically. Helical and trapezoidal glazing bars were used where a fixed light was in use (flashing or non-rotating) as vertical bars cut off portions of the light. In comparison, a helical bar design crosses the light source at an angle, obscuring part of it.

Glazing – middle section of the lantern, circular or polygonal in plan, between the lantern roof above and the lantern