Northern Dry Rocks

reef in Key Largo

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Details

Open Water

Minimum Recommended Certification

Max Depth	45 ft
Average Depth	20 ft

Access

Permanent Mooring Balls

GPS coordinates

25° 08.362' N
80° 17.641' W

Frequently visiting operators

	Horizon Divers
	Rainbow Reef Dive Center
	Silent World Scuba Center

🎥 FloridaKeysTV

Upcoming trips (17)

Operator	Date	Time	Availability click-to-book	Trip Name click for details
Rainbow Reef Dive Center	2025-12-14	13:30	Y	Christ Statue,Double North
Rainbow Reef Dive Center	2025-12-15	13:30	Y	Christ Statue,North Dry Rocks
Rainbow Reef Dive Center	2025-12-16	13:30	Y	Christ Statue,The Horseshoe
Rainbow Reef Dive Center	2025-12-17	13:30	Y	Anchor Chain,The Horseshoe
Rainbow Reef Dive Center	2025-12-19	13:30	Y	Double North,Minnow Cave
Rainbow Reef Dive Center	2025-12-21	13:30	Y	Christ Statue,Double North
Rainbow Reef Dive Center	2025-12-22	13:30	Y	Christ Statue,North Dry Rocks
Rainbow Reef Dive Center	2025-12-23	13:30	Y	Christ Statue,The Horseshoe
Rainbow Reef Dive Center	2025-12-24	13:30	Y	Anchor Chain,The Horseshoe
Rainbow Reef Dive Center	2025-12-26	13:30	Y	Double North,Minnow Cave
Rainbow Reef Dive Center	2025-12-26	13:30	Y	North Dry Rocks,Double North
Rainbow Reef Dive Center	2025-12-28	13:30	Y	Christ Statue,Double North
Rainbow Reef Dive Center	2025-12-29	13:30	Y	Christ Statue,North Dry Rocks
Rainbow Reef Dive Center	2025-12-30	13:30	Y	Christ Statue,The Horseshoe
Rainbow Reef Dive Center	2025-12-31	13:30	Y	Anchor Chain,The Horseshoe
Rainbow Reef Dive Center	2026-01-02	13:30	Y	Double North,Minnow Cave
Rainbow Reef Dive Center	2026-01-02	13:30	Y	North Dry Rocks,Double North

A moray eel rests under the a ledge

📸 Pablo Strika

A huge variety of hard and soft corals call this site home

📸 Pablo Strika

Fan corals dance with the surge

📸 Pablo Strika

A school of grunts pose for the picture

📸 Pablo Strika

Cave formations are common in this site (Minnow Caves)

📸 Pablo Strika

Divers explore this shallow site

📸 Pablo Strika

Best Gas

show details

Diluent mix

Oxygen 21%

Helium 35%

Nitrogen 47%

Gas prices

Diluent tank	$35.50
O2 tank	$10.00

Diluent

Diluent PPO2 at max depth (45 ft) 0.9 atm

O2 Content Diluent

Set Point 1.2 atm

Set Point

END at max depth (45 ft) ft

He Content Diluent

O2 narcotic?

Loop temperature at depth °F/°C

Loop temperature

Consider H2O vapor?

Gas density g/L

Hypoxic at surface

Calculate Best Diluent

Gas mix

Oxygen Bottom PPO2

Helium Bottom PPO2

Nitrogen Bottom PPO2

Gas prices

Aluminum 80	$10
Steel HP 100	$10
Steel LP 85	$10

NDL at 45 ft - 24 hr min surface interval - m

Calculate NDL

Always use a dive computer

Nitrox

PPO2 at max depth (45 ft) Bottom PPO2 atm

PPO2 at average depth (20 ft) Bottom PPO2 atm

O2 Content

32%

Calculate Best Nitrox

Decompression planning

Site Description

Route

Typical Conditions

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