航空信

航 = 亢 + 舟 : Hamlet (h) decided to run away to sea 13 years ago. Now, having sailed (航) the seven seas, he's an accomplished captain and looking out of his yellow submarine (舟) wearing a turtleneck sweater (亢) in the anglepod's kitchen (ang2).

空 = 工 + 穴 : Mnemonic symbol: an air conditioner

空 = 工 + 穴 : In front of the engine, Karl Koala found some very special cave paintings. Using steel beams he constructs a protective cover. He also installs air conditioning to make the best environment possible to preserve the cave paintings.

信 = 亻 + 言 : Marie Curie and Rosa Luxemburg are reading a letter of Karl Marx to the public in the encampment's bathroom. To make the message really come across to the people they use a megaphone.