Both Uses of

derelict
in
The Island of Dr. Moreau

ON February the First 1887, the Lady Vain was lost by collision with a derelict when about the latitude 1 degree S. and longitude 107 degrees W. On January the Fifth, 1888—that is eleven months and four days after—my uncle, Edward Prendick, a private gentleman, who certainly went aboard the Lady Vain at Callao, and who had been considered drowned, was picked up in latitude 5 degrees 3' S. and longitude 101 degrees W. in a small open boat of which the name was illegible, but which is supposed to have belonged to the missing schooner Ipecacuanha.†
Chpt Intr.

As everyone knows, she collided with a derelict when ten days out from Callao.†
Chpt 1 *

Definitions:

(1) (derelict as in: derelict in her duty)
failing to fulfill one's responsibilities -- especially through lack of effort
(2) (derelict as in: derelict ship)
in terrible condition and/or abandoned
(3) (meaning too rare to warrant focus)
meaning too rare to warrant focus:

More rarely (and typically in older literature), derelict can refer to a person who is unable to support himself and is abandoned by society.