Thomas Grey's "The Rule of the Road" is:
"When all three lights I see ahead,
I turn to Starboard and show my Red:
Green to Green, Red to Red,
Perfect Safety -- Go Ahead.
But if to Starboard Red appear,
It is my duty to keep clear --
To act as judgment says is proper:
To Port or Starboard, Back or Stop her.
And if upon my Port is seen
A Steamer's Starboard light of Green,
I hold my course and watch to see
That Green to Port keeps Clear of me.
Both in safety and in doubt
Always keep a good look out.
In Danger, with no room to turn,
Ease her, Stop her, Go Astern."
There are a few other mnemonics regarding lights, but the odds of seeing them referenced in our logs is pretty slim.
"Red over Red, the Captain is Dead" referencing two red mast lights to show that the vessel is not under command.
"Three reds in a row, No room below" mast lights again showing that a vessel is constrained by her draft (meaning that the water beneath and to both sides prevents the vessel from altering her course).
"Red over White, Fishing at Night" pretty self-explanatory, again referencing mast lights.
"Red over Green, Sailing Machine" could be seen referencing sighting of sailing vessels at night in bad weather.
There are still more, but I wouldn't expect to see any of them referenced directly.