Fog Signal General

Fog Signal Kind:

Time to start:

How long will pressure last:

Manufacturer:

Year of Manufacture:

Characteristic:

Duplication:

Timing device:

If whistle, siren or trumpet, Pressure at which blown:

Height above water:

Compass direction:

Location:

Distance and direction:

Water supply:

Reached from Lighthouse:

Desc of Fog signal building:

Pressure and recording gauge:

Lighthouse Inspection Reports Database

Mile Rocks Light Station

Fog Signal General

10" air whistle; operated by duplicate 20 hp Hornsby-Akroyd oil engine. Also duplicate air compressors for each.

About 30 min

Hornsby Akroyd, De La Vergne Machine Co., NY

1905

3 sec blast every 27 sec.

engines, compressors, 1 whistle, Crosby automatic signal in duplicate

Crosby automatic

55 lbs (low pressure in tank)

50'

For marking Mile Rocks. Fog signal for guidance to navigation entering San Francisco Harbor.

connected with lighthouse

brought from San Francisco by water boat

Fog signal in side of tower 22' x 34'

Report Sections:

Lighthouse Access | Station Boat Info | Tools and Accessories | Light Vessel Specific | Inspection Reports