Day 16: Black Lagoon

Be careful navigating these waters—some holes are deeper than they look, and something might yank you down into the eddies below.

Surface

1		2					3	4		5
						6
7					8
				9
10
								11
12			13							14
		15
16							17
18					19

Across

1. Setting for House or Grey's Anatomy
3. Device for removing avocado interiors
7. Preacher's position
8. Inscriptions on tombstones
10. 1978 single from Faith Hope and Charity
13. Coach/Olympian/mathematician Ottmar
16. Crotaline serpent
17. Irritates maliciously
18. Board game featuring Eyrie Dynasties and Lizard Cult
19. Cover this with a pasty

Down

1. Aspired or expected
2. Requires reticulation before you can play SimCity
4. Sends a message via pipes or prison cell wall
5. Chance to collect oneself
6. Personify, embody
9. British fighter planes of the 1940s (or hot-tempered people)
11. Don't stop now! You'll get there!
12. Jollity-bearing planet
14. Notwithstanding
15. Red Storm coach Rick

Underwater

This is a "Marching Bands" puzzle. The Rows answers go straight across horizontally, two answers per row. (You can trust that the black square in the middle separates the two answers for Row 6.) The Currents, which are usually called "Bands," have answers that go clockwise from their top left corners, all the way around each square.

1/A
2	B
3		C
4			D
5				E
6
7
8
9
10
11

Rows

1. Avow
   Mouth-related
2. Apple, in Oslo
   Town in first season of Fargo
3. Cat's job description
   Drag a playhead
4. Good of Stomp the Yard
   2006 MTV India Youth Icon Mahendra
5. Great application for constructing crosswords, when you can't connect to Google Sheets
   Book featuring the Judgment of Solomon and the widow of Zarephath
6. Current name of Firmum Picenum
   Sister of Sherlock and Mycroft, apparently
7. Bad blood
   Something to do at school
8. Neat!
   Loved, revered
9. Composer Nobuo
   Symbol for a voiced bilabial fricative
10. No less than myself!
    Monarch-related
11. Glorious hair
    Mary with a talking umbrella

Currents

1. Lecturer with a PhD
   Phone records that show you were arguing with customer service at the time the victim was garrotted, e.g.
   Footwear for Bible movie or surfing movie
   Bite playfully
   "Leo" is a good one, but "Benedict" doesn't hit my ear well, and "Innocent" just sounds suspicious
   A woman in France
2. Commoner
   Between min and max
   Psychology and Alchemy author
   The IDEA says an IEP should arrange this for students, to make sure they all get a FAPE
   Jazz standard named for a citrus
   Tube for blood
   Rebranded Audi A4 B7
3. People who don't abstain
   SNES protagonist who wields a Swallow or a mop
   100 square meters
   A Dante or Pallas to set on your shelf
   Flexible type of radio
   Red, white, and yellow plugs
4. "Where there is only a choice between cowardice and violence," he "would advise violence"
   Revitalizing prefix
   Period when you should be safe from vampires
5. Probabilistic phrase in yearbook superlatives

Answer Checker: Check

Hints: Some cells on the Surface grid contain more than one letter. All such cells contain the same three-letter string. That string is PIT.

Solution/Explanation