Entrance shaft at ground level with pair of hinged hatches, a trapdoor and two steel plate air ventilators Photographer: William Martinson - 2019

Escape shaft at ground level Photographer: William Martinson - 2019

Entrance into underground Plotting Rooms Photographer: William Martinson - 2019

Escape shaft at ground level with hinged hatch and two steel plate air ventilators Photographer: William Martinson - 2019

Steel entrance door into Battery Plotting Room (taken from within Battery Plotting Room) Photographer: William Martinson - 2019

Escape passage from Battery Plotting Room Photographer: William Martinson - 2019

Steel entrance door into Fortress Plotting Room (taken from within Fortress Plotting Room) Photographer: William Martinson - 2019

Galvanised sheet metal ducting for return air in Fan Room Photographer: William Martinson - 2019

Sump and floor drains at entrance to ventilation duct Photographer: William Martinson - 2019

Base of steep ladder stair within entrance shaft Photographer: William Martinson - 2019

Entrance door into Battery Plotting Room from entrance shaft Photographer: William Martinson - 2019

View up escape shaft Photographer: William Martinson - 2019

View from escape passage into Battery Plotting Room Photographer: William Martinson - 2019

Splayed cable duct from escape passage to Battery Plotting room Photographer: William Martinson - 2019

Mesh grille to ventilation opening above access panel into escape hatch Photographer: William Martinson - 2019

Galvanised sheet metal ducting for return air in Battery Plotting Room Photographer: William Martinson - 2019

Escape passage with pair of counterweight tubes at base of escape shaft Photographer: William Martinson - 2019

Detail of sump Photographer: William Martinson - 2019

Drainage holes in concrete ceiling of ventilation duct Photographer: William Martinson - 2019

Ventilation duct Photographer: William Martinson - 2019

View towards louvred ventilator - from ventilation duct Photographer: William Martinson - 2019

Ventilation duct with dished floor Photographer: William Martinson - 2019

Ventilation duct with dished floor Photographer: William Martinson - 2019

Louvred low level air vent Photographer: William Martinson - 2019

Fortress Plotting room with graffiti Photographer: William Martinson - 2019

Galvanised sheet metal ducting for return air in Fortress Plotting Room Photographer: William Martinson - 2019

Detail of hinge Photographer: William Martinson - 2019

Detail of ladder rungs mounted in wall Photographer: William Martinson - 2019

Detail of ladder rungs mounted in the wall at the entrance to escape passage Photographer: William Martinson - 2019

Electric switchgear on wall in Fan Room Photographer: William Martinson - 2019

Galvanised sheet metal ducting for return air in Battery Plotting Room Photographer: William Martinson - 2019

Galvanised sheet metal ducting for return air in Battery Plotting Room Photographer: William Martinson - 2019

Battery Plotting Room showing door into Fan Room Photographer: William Martinson - 2019

Detail of door catch on entrance door into Battery Plotting Room Photographer: William Martinson - 2019

View up access shaft to air intake and extract ducts Photographer: William Martinson - 2019

Base of ladder stair Photographer: William Martinson - 2019

Triangular bracket for counterweight cable in escape stair Photographer: William Martinson - 2019

View down escape shaft from exit hatch Photographer: William Martinson - 2019

Fixed pulley (one of two) mounted on side of escape shaft for counterweight cable Photographer: William Martinson - 2019

View from Battery Plotting Room towards the escape shaft and door into Fortress Plotting Room Photographer: William Martinson - 2019

Steel frame mounted on north wall in Fortress Plotting Room Photographer: William Martinson - 2019

Pulley on bracket at head of escape shaft Photographer: William Martinson - 2019

Members of the Artillery Specialist Women’s Auxiliary Army Service (ASWAAS) Source: Island at War pg 162 Submitted by William Martinson Photographer: Unidentified

Measured drawing. Mens & delt W. Martinson Click for larger image