The Moonbase is divided into "areas" or "sections" ("area B" and "section B" are synonymous in End Of Eternity). These may be named after the organisational sections ("Medical", "Security", "Service", as in Breakaway), or numerically (sections 1 to 5 in The Testament Of Arkadia; "section 5" in The Troubled Spirit; "section 8" in New Adam, New Eve; "section 37" in Guardian Of Piri; perimeter areas 4, 6 & 9 in The Dorcons; the air conditioning display in The Bringers Of Wonder part 2 shows just areas 1-3) or alphabetically ("area B" in The Exiles, sections A to E in Space Brain, sections C, F & G in Force Of Life, sections A through G & F in One Moment Of Humanity, section L in Dorzak). Blocks within alphabetic sections are numbered ("sections G6, 8 & 11" in Ring Around The Moon, "block 9 in section D" in Dorzak).
Floor levels are alphabetic (levels A, B ,C & D in both Space Warp & The Seance Spectre). Corridors are numeric (corridor 9 in War Games; 34 in The Beta Cloud; 15, 16, 49, 50 & 53 in Force Of Life). Elevators are numbered (elevator 7 in Space Warp) as are travel tubes (nearly all sets show the number 2; 12 appears in Collision Course; 4 and "D" appear in The Seance Spectre).
Communications posts in relevant areas display a symbol bearing the initial letter of the section on the background colour of the section (in most corridors this is the yellow S for Service). In Year 1 the letters were in the Countdown typeface; in Year 2 a plain sans serif typeface. The following letters were seen:
Communications posts in corridors had three direction signs. The locations indicated were:

Other arbitrary letters and numbers appeared on corner wall panels in corridors. In Year 1 there were minimal signs (mostly over the top of doors, although round stickers were also seen identifying airlocks (eg End Of Eternity, The Last Sunset, The Last Enemy). In Year 2 more signs appeared, often multi-coloured. Note the unusual use of a glass panel in a corridor partly seen in Force Of Life, identifying the Nuclear Generating Area.
The wall map seen in corridors in both series listed locations and marked them in a table against columns headed "F E D C B A B C D E F". There is a rare close-up in Seed Of Destruction.
| F | E | D | C | B | A | B | C | D | E | F | F | E | D | C | B | A | B | C | D | E | F | ||||
| COMPUTER BANKS | POWER DISTRIBUTION | ||||||||||||||||||||||||
| CHEMICAL RESEARCH | RECONNAISSANCE SECTION | ||||||||||||||||||||||||
| GYMNASIUM | REACTORS | ||||||||||||||||||||||||
| HANGER AREAS | RESTAURANTS | ||||||||||||||||||||||||
| HYDROPONIC FARM AREAS | SOLA ENERGY PLANT | ||||||||||||||||||||||||
| LAUNCHING/LANDING AREAs | SOLARIUM 1 | ||||||||||||||||||||||||
| LIVING QUARTERS | SUPPLY DEPOTS | ||||||||||||||||||||||||
| MAIN MISSION | SECURITY | ||||||||||||||||||||||||
| MAINTENANCE WORKSHOPS | SOLARIUM 2 | ||||||||||||||||||||||||
| MEDICAL CENTRE | TRAVEL TUBE DEPOTS | ||||||||||||||||||||||||
| NUCLEAR REACTORS | TECHNICAL & ENGINEERING |
Copyright Martin Willey