Document ID: chunk:federal_register_of_legislation:F2021L01587:reg:1961:p5
Version: federal_register_of_legislation:F2021L01587
Segment Type: reg
Provision Reference: reg 1961 (pt 5/19)
Character Range: 56883–59860

1909 Chance Brothers 920mm focal radius catadioptric rotating lens assembly of glass and gunmetal, rotating at 1.33 rpm. Gives three double- flashes in each revolution.
       * Bearing – 1909 Chance Bros mercury float, see pedestal below.
Eddystone Point is one of six AMSA lighthouses still operating with a 1st order rotating optical apparatus and mercury float pedestal. The 1909 apparatus was removed from Cape du Couedic in 1957, and installed here in 1961. This lens assembly is currently unlit, but still rotating.
Condition: intact and sound
Integrity: high
Significance: high
Maintenance: keep in service, clean at normal intervals
Rectification works: none

Heritage significance: High
The lens assembly is a historic part of a lighthouse associated with the development of marine AtoN in the Bass Strait (criterion a).
The 1st Order Chance Brothers assembly is one of six still in operation in an AMSA lighthouse (criterion b).

Lighthouse feature: Light source
Description and condition
1000W-120V tungsten halogen lamp in UVLA 590 lamp changer (temporarily removed).
Note: The 1st Order lens assembly have been temporarily decommissioned; replaced by a VRB- 25 beacon mounted on the handrails. The lamp was turned off due to its overwhelming contribution to the decrease in population of Short-tailed Shearwater birds in the area. The lamp caused the birds to fly into the lighthouse, damaging the Shear- water population and lighthouse.
Condition: not assessed
Integrity: not assessed
Significance: low
Maintenance: not assessed
Rectification works: none

Heritage significance: Low

Lighthouse feature: Pedestal
Description and condition
1909 Chance Bros mercury float pedestal.
       * Base – Chance Bros cast iron, with central circular base for pillar.
       * Pillar – Chance Bros cast ferrous pillar with machined thread for adjustment of mercury trough.
       * Mercury trough – Chance Bros cast iron circular trough with integral circular and radial strengthening ribs underneath, fitted to threaded top of the pillar. The mercury is still in place. Manhole and iron ladder to allow access to lamp. Driving pinion, spindle and carrier still in place.
       * Mercury float – Chance Bros cast iron annular float inside the trough.
       * Lamp platform – Chance Bros cast iron platform with ribbed top surface.
       * Lamp stand – Chance Bros burner stand of cast iron, with later adapter added on top to support the lamp changer.
       * Drive mechanism – two motor/gearbox units, on 1961 steel cabinet (clock removed).
Finish: painted
Condition: intact and sound
Integrity: high
Significance: high
Maintenance: keep in service, prepare and repaint pedestal at normal intervals
Rectification works: none

Heritage significance: High
The pedestal is an historic and essential part of a lighthouse associated with the development of marine AtoN in the Bass Strait (criterion a).
The lighthouse retains its original mercury float pedestal (criterion