| Show SIGNPOSTS WILL I GUIDE AVIATORS Letters Six Feet High Are Recommended Not long hence th aviator n who Js is flyIng over strange wIll be able bl to find himself by glancing down at the roots roofs ot of till cities over o whIch he Is passing lIe He will wUl look for aerial sIgnposts These will wUl consIst ot of huge letters ern 10 the tho roots roofs or of the city's large building spelling out Its nome name Installation III these sIgnposts Is expected to b begin soon In some of the large clUes cities Specifications and Instructions ham I been beeD prepared by the branch of the Commerce department and ond these have been sent out to chain cham chambers hers bers of commerce In clUes cities throughout the county WIth air travel developing morn rapidly than the Installation lation ot of old aids to aerial navigation the marking or cities Is without doubt the most Im medIately Important aid to avIatIon n a statement Issued by the department snide said Roofs on OD which signposts are arc placed should be preferably of tIl tile shingle le tin or other metal or of slate A simple block letter Jetter In chrome low with a du dull should be use used 1 If the roof has n slope of oV over r SO degrees degre s' s the sign should be painted on both sides The name of the city should be spelled out wIth un an arrow pointing In Inthe Inthe the dIrectIon of the city's aIrport The width of letters such as Mor M 1 or v. should equal two thIrds their height with other letters Jetters In lion A spacIng of one fourth the heIght should be used b between tween letters Jetters The letters should be not less than six feet teet In hel ht as g lar I w n-w 0 as possible Letters less than six feet teel high cannot be seen ot at a great grent height Where gravel or pitch roots roofs offer olTer the best location wooden letters may be elevated above the roof or the sign may be painted on a dull black back ground form d of wood raised on legs leg above the roof proper Where raIsed letters alone are used the gravel roof beneath should be so treated ted as to i give a darker ground than the gray of the gravel It Is of prImary Importance that the names be lighted nt at night nal flood lights may be employed 1 the number depending on OD the area aren to tobe tobe be illuminated and type ot of flood light used |
