Possible Clues:

• Picked up taps oddly found in outbuilding — they may need plumbing
• Distances down or front to back
• Ocean-bottom areas
• Extents downward, backward or inward
• Distances below sea level
• Deep water shelter put back around small port
• Ocean abysses
• Demoralisation as part of organisation has no heart
• Ocean recesses
• Deepest or most central parts