Dive Logging

Dive Logging

Submersion provides comprehensive dive logging with 40+ data fields. This guide covers all the available options.

Creating a New Dive

From the Dives tab, tap the + Log Dive button to open the dive entry form.

Dive Entry Fields

Basic Information

Field	Description	Required
Dive Number	Auto-assigned or manual	No
Date & Time	When the dive started	Yes
Entry Time	When you entered the water	No
Exit Time	When you surfaced	No

Tip: If you set Entry and Exit times, duration is calculated automatically.

Depth & Duration

Field	Description
Max Depth	Maximum depth reached (m or ft)
Avg Depth	Average depth (often from dive computer)
Duration	Bottom time in minutes
Runtime	Total time including descent/ascent

Location

Field	Description
Dive Site	Select from your site database
Dive Center	Operator/shop you dove with
Trip	Group dives into trips

Conditions

Field	Options
Water Temperature	Temperature in C or F
Air Temperature	Surface air temp
Visibility	Excellent (30m+), Good (15-30m), Moderate (5-15m), Poor (<5m)
Water Type	Salt, Fresh, Brackish
Current Direction	N, NE, E, SE, S, SW, W, NW, Variable, None
Current Strength	None, Light, Moderate, Strong
Swell Height	Wave height in meters
Entry Method	Shore, Boat, Back Roll, Giant Stride, etc.
Exit Method	Same options as entry

Tanks & Gas

You can add multiple tanks per dive:

Field	Description
Volume	Tank size (e.g., 12L, 80 cu ft)
Working Pressure	Rated pressure of tank
Start Pressure	Pressure at dive start
End Pressure	Pressure at dive end
O2 Percent	Oxygen percentage (21% for air)
He Percent	Helium percentage (0% for air/nitrox)
Tank Role	Back Gas, Stage, Deco, Bailout
Tank Material	Aluminum, Steel, Carbon Fiber

Tank Presets: Use preset buttons like "AL80" or "HP100" to quickly fill in common tank configurations.

Technical Diving

For technical divers, additional fields are available:

Field	Description
Altitude	Elevation above sea level (for altitude diving)
Surface Pressure	Ambient pressure if not standard
Surface Interval	Time since last dive
GF Low / GF High	Gradient factors used
Dive Mode	Open Circuit, CCR, SCR
CNS Start	Starting CNS%
CNS End	Ending CNS% (calculated if profile exists)
OTU	Oxygen Tolerance Units accumulated

People

Field	Description
Buddy	Select from buddy database
Dive Master	Name of DM/guide
Buddy Role	Buddy, Dive Guide, Instructor, Student, Divemaster, Solo

Organization

Field	Description
Dive Type	Recreational, Technical, Night, Wreck, Cave, etc.
Tags	Custom colored tags for organization
Rating	1-5 star rating
Favorite	Mark as favorite for quick access
Notes	Free-text notes

Dive Profile

If you download dives from a dive computer, the profile data is stored and visualized:

Profile features:

• Zoom & Pan - Pinch to zoom, drag to pan
• Touch Markers - Tap to see data at any point
• Overlays - Toggle temperature, pressure, heart rate
• Ascent Rate - Color-coded warnings

Dive List Features

Sorting & Filtering

The dive list can be sorted and filtered:

• Sort by: Date, Dive Number, Depth, Duration
• Filter by: Date range, Site, Dive Type, Tags

Search

Use the search bar to find dives by:

• Site name
• Notes content
• Buddy name

Bulk Operations

Select multiple dives to:

• Delete in bulk
• Export selected dives
• Apply tags

Multi-Computer Support

If you dive with multiple computers, Submersion tracks profiles from each:

1. The primary profile is used for statistics
2. Switch between profiles using the profile selector
3. Each computer is tracked separately with its own dive history

Automatic Dive Numbering

Submersion automatically numbers your dives:

• New dives get the next sequential number
• If you add a historical dive, numbers adjust
• Renumbering available in Settings if needed

Equipment Linking

Link equipment to each dive:

1. Scroll to the Equipment section
2. Tap Add Equipment
3. Select items from your gear catalog

This helps track usage and when gear needs service.

Weight Tracking

Track your weighting for each dive:

Weight Type	Description
Belt	Traditional weight belt
Integrated	BCD integrated weights
Trim	Trim weights for balance
Ankle	Ankle weights
Backplate	Backplate weights

Marine Life

Log species sightings:

1. Go to the Sightings section
2. Tap Add Sighting
3. Search the species database
4. Enter count and optional notes

Rebreather Fields (CCR/SCR)

When Dive Mode is set to CCR or SCR, additional fields become available for technical divers: setpoint values (low, high, deco), loop volume, diluent gas mix, scrubber information (type, time used, capacity), and loop O2 measurements. SCR dives also expose a sub-type selector (Constant Mass Flow, Passive Addition, or Electronically Controlled).

Custom Fields

You can attach arbitrary key-value pairs to any dive using the Custom Fields section of the dive entry form. This is useful for recording data that does not fit into the built-in fields, such as research codes, equipment serial numbers used on a particular dive, or instructor sign-off notes.

Wearable Data

Dives imported from wearable devices (Apple Watch, Garmin) retain a wearableSource marker indicating where the data originated. Heart rate and other biometric data captured by the wearable are stored alongside the dive profile and can be viewed on the profile chart overlays.

Tips for Good Dive Logs

1. Log immediately - Details fade quickly after diving
2. Use notes - Future you will thank present you
3. Be consistent - Use the same fields for better stats
4. Add context - Conditions affect dive quality
5. Rate honestly - Helps identify your favorite types of diving