Coffins Patch

reef in Marathon

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Details

Open Water

Minimum Recommended Certification

Max Depth	20 ft
Average Depth	12 ft

Access

Permanent Mooring Balls

GPS coordinates

24° 41.144' N
80° 57.839' W

Frequently visiting operators

Captain Hook's Marathon

🎥 Gables On The Go

A school of grunts swim in this shallow reef

📸 Unknown

All kind of corals and sponges are present in this site

📸 Unknown

An aerial view of Coffins Patch

📸 Unkown

Both soft and hard coral are abundant in this site

📸 Unknown

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 (20 ft) 0.9 atm

O2 Content Diluent

Set Point 1.2 atm

Set Point

END at max depth (20 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 20 ft - 24 hr min surface interval - m

Calculate NDL

Always use a dive computer

Nitrox

PPO2 at max depth (20 ft) Bottom PPO2 atm

PPO2 at average depth (12 ft) Bottom PPO2 atm

O2 Content

32%

Calculate Best Nitrox

Decompression planning

Site Description

Route

Typical Conditions

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