Photocopy this page. Fill in one copy before each dive. Show it to your instructor.
Site & Dive Information
Site name: ________________________________
Date: ________________________________
Dive number (1 / 2 / 3): ________________________________
Expected bottom depth (d): ________________________________ (ft or m)
Selected sonar beam angle (θ): ________________________________ (7°, 20°, or 47°)
Acoustic Calculations (Dive 1)
Footprint diameter D = 2d tan(θ/2): ________________________________
Show your work:
Required lane spacing s = D × 0.70: ________________________________
Rounded lane spacing (round DOWN): ________________________________
Photogrammetric Calculations (Dive 2 or 3)
Camera air-rated half-FOV (α_air): ________________________________
Underwater half-FOV α_water = arcsin(sin(α_air)/1.33): ________________________________
Working distance from subject: ________________________________ (m)
Underwater frame width on subject (W): ________________________________ (m)
Required overlap (O): ________________________________ (0.80 typical)
Baseline B = W × (1−O): ________________________________ (m)
Planned swim speed (v): ________________________________ (0.3–0.5 m/s typical)
Shutter interval t = B/v: ________________________________ (seconds)
Intervalometer setting (round UP): ________________________________ (seconds)
Dive 2 — Orbit Specifics (if applicable)
Orbit radius (r): ________________________________
Angular spacing Δφ = B/r: ________________________________ (rad and degrees)
Frames per 360° = 360 / Δφ_degrees: ________________________________
Add 10% safety margin → plan ____ frames per orbit: ________________________________
Pre-Dive Safety Confirmation
EAN mix analyzed (%): ________________________________
Dive computer set for that mix? ________________________________ (yes / no)
Starting tank pressure: ________________________________
Turn pressure (1500 PSI): ________________________________ (confirm)
Surface pressure (700 PSI): ________________________________ (confirm)
Float and finger spool inspected: ________________________________ (yes / no)
Dive flag visible: ________________________________ (yes / no)
Surface watch in place: ________________________________ (yes / no)
Team role assigned (Photographer / Safety): ________________________________
Abort criteria stated and agreed: ________________________________ (yes / no)
Data and Reference Confirmation
Phone or tablet topside with Surface Data Operator: ________________________________ (yes / no)
App recording and GPS lock checked before data run: ________________________________ (yes / no)
Battery, power, and storage sufficient: ________________________________ (yes / no)
Raw-data backup location: ________________________________
Scale bar / known-distance reference in use: ________________________________ (yes / no)
Control points / checkpoints documented: ________________________________ (yes / no / N/A)
Environmental no-contact plan confirmed: ________________________________ (yes / no)
Instructor sign-off: _______________________________________________