Derelict is a science fiction webcomic set in a post-flood world, written and drawn by Ben Fleuter (also the author of Galactic Maximum). It's about Dang Thu Mai, a lone scavenger living on a boat and coping with her surroundings. Complicating matters is an otherworldly fog which shrouds the world, and hides the so-called "Miasmic Races", monstrous yet intelligent beings, most of whom possess nothing but ill will for humanity.Starts here.
Anachronic Order: The segment with Dang on board the Miasmic-occupied oil-drilling complex requires several re-reads in order to get the order of events right.
All There in the Manual: Ben has revealed in other projects, and on the Nothing Personal forums, much more information than the comic itself has.
After the End: Though we still don't know exactly what the end was, yet.
Author Appeal: Ben is rather fascinated by the subject, to say the least.
The Ark: Mention is made of massive floating structures called 'Ark Cities' where many humans now live.
Chiaroscuro: As Dang chases down the stolen Pen at night
Did We Just Have Tea with Cthulhu?: "This One": the size of a jumbo jet, has a mouth full of wriggling tentacles, ghostly white, and able to force its way into your mind to convey thoughts and images; is polite, helpful, and generally wants the best in life for others.
Disaster Scavengers: Dang is one, and there are certainly others. There are hints that these don't make up the majority of the population, though.
Flashback: The sequence on the oil rig is half Dang trying to find oil for the Penumbra, half flashback to an earlier time when Dang had a lot more fight in her and was exposed to the Miasma.
Houseboat Hero: Although Dang does sometimes sleep on land when scavenging, it is abundantly clear that the Penumbra is her home.
Important Haircut: Ben uses the length of Dang's hair to help indicate time passing between events; the growth is just as important as the cutting.
Malevolent Masked Men: The humanoid Miasmic races. The masks and voluminous cloaks protect them from the sun, seeing as they're burned by ultraviolet light.
My Species Doth Protest Too Much: Possibly. At the least, Beautiful Flower was not nearly as nasty as the other miasmic beings; she regretted stealing Dang's boat and later uttered a prayer when it appeared she killed Dang.
Oceanic Airlines: Dang comes across a crashed passenger jet which is sporting an Oceanic Airlines logo
Ominous Fog: Which is apparently not normal fog, as it may be poisonous and hides inhuman beings who are intelligent, but not, apparently, inclined to play nicely with humanity. It's also drawn in a way that resembles tentacles.
Taken for Granite: A risk the Miasmic Races run if they are exposed to ultraviolet light.
Weakened by the Light: The Miasmic Races cannot stand ultraviolet light (it turns them to stone), so they go cloaked and helmeted (well, skulled, usually) during the daytime. Humanity has apparently somehow developed UV weapons to use against them.