The point of a codename is that you want people to remember it. It's much easier to for people remember the name of a project called "Sea Serpent" or "Bulldoze

The point of a codename is that you want people to remember it. It's much easier to for people remember the name of a project called "Sea Serpent" or "Bulldozer Gear" than ones called "Therty Athemark" or "Systiong", because the two former have previous associations that help us remember them.