A Second Officer of the Titanic admitted years later the ship's binoculars were in a lock box that no one had a key to!

Lightoller was a veteran of the sea by the age of 21. He was the second officer and the most senior officer to survive the sinking of the Titanic. He was later a naval officer in World War I and headed sailboats in World War II. Speaking of the Titanic, though, Lightoller actually boarded the ship in Belfast as its first officer for the sea trials. Captain Smith gave Henry Wilde of the Olympic, the position of chief officer. That decision demoted William McMaster Murdoch to first officer and Lightoller became second officer. 

This all becomes relevant. So, the late change in staff left the original second officer, David Blair, out of the trip altogether. It was a problem, because Blair was the one with the key to the ship’s binocular case. The crew ended up having no access to the binoculars for the entire trip. Lightoller promised to buy binoculars once they docked in New York. We know that they never made it, and that those binoculars would have been crucial in saving thousands of lives.

(Source)