Does he find sabotage, corporate greed, a pilot who memorized an eye chart he could no longer read?
From the time.com
Everybody can contribute his nautical knowledges about estuary, harbours and Marina, as geografic chart information and as textdata in a linked Wiki-port pilot book.
From the en.wikipedia.org
The pilot must use timing, given a known airspeed, or DME to remain within the limits described on the approach chart.