ist . ▁They ▁fle w ▁over ▁the ▁coast ▁from ▁Port ▁K emb la ▁to ▁For ster , ▁selecting ▁sites ▁near ▁Port ▁K emb la , ▁near ▁Terr ig al , ▁and ▁at ▁Tom are e ▁Head . ▁ ▁The ▁recommendation ▁by ▁the ▁Services ▁was ▁to ▁locate ▁the ▁" available " ▁rad ar ▁sets ▁to ▁protect ▁" the ▁vital ▁New castle - S yd ney - Port ▁K emb la ▁industrial ▁region ", ▁which ▁was ▁accepted ▁by ▁the ▁highest ▁authority . ▁App lying ▁this ▁priority , ▁the ▁survey ▁officers ▁used ▁New castle ▁steel ▁works ▁as ▁their ▁point ▁of ▁reference ▁when ▁dec iding ▁on ▁Tom are e ▁Head . ▁ ▁Japan ▁burst ▁into ▁the ▁war ▁before ▁the ▁rad ar ▁building ▁was ▁started . ▁The ▁British ▁rad ar ▁set ▁was ▁hast ily ▁placed ▁in ▁a ▁vac ant ▁b unker ▁in ▁New castle . ▁By ▁the ▁time ▁the ▁rad ar ▁building ▁was ▁completed ▁on ▁Tom are e ▁Head , ▁an ▁Australian ▁rad ar ▁known ▁as ▁A W ▁was ▁available ▁from ▁the ▁factory . ▁The ▁British ▁set ▁could ▁now ▁be ▁removed ▁and ▁was ▁sent ▁to ▁the ▁place ▁near ▁Terr ig al . ▁ ▁The ▁A W ▁rad ar ▁was ▁made ▁possible ▁by ▁a ▁surprise ▁break - through ▁at ▁the ▁Rad i oph ys ics ▁Labor atory . ▁Dr ▁J . ▁H . ▁P idd ington ▁adapted ▁the ▁design ▁of ▁a ▁short ▁range ▁rad ar , ▁a ▁familiar ▁design , ▁producing ▁the ▁range ▁necessary ▁for ▁air ▁warning , ▁no ▁special ▁components ▁needed . ▁A ▁version ▁called ▁L W /