Apollo 13 diagram. I - Lunar module descent stage; II - Lunar module ascent stage; III - Command module; IV - Service module.
LM descent engine skirt;
LM landing gear;
LM ladder;
Egress platform;
Forward hatch;
LM reaction control system quad;
S-band inflight antenna (2);
Rendezvous radar antenna;
S-band steerable antenna;
Command Module crew compartment;
Electrical power system radiators;
SM reaction control system quad;
Environmental control system radiator;
S-band steerable high gain antenna;
Nozzle extension;
Docking window;
VHF antenna;
Docking target;
LM overhead hatch;
CSM combined tunnel hatch;
Viewing windows;
Aft heatshield.