I built a sonar into my surfboard

In plain words

This surfboard features integrated sonar technology to help riders detect underwater conditions and obstacles. Launched in 2021, it's designed for surfers who want real-time information about what's beneath them while riding waves. The sonar capability distinguishes it from standard surfboards by providing situational awareness below the water's surface, potentially helping with safety and wave selection.

written from the facts on this page · September 2026

From the sources

Out surfing, I often wonder how deep the water is, and suspect based on wave behavior that I’m over a deep spot or a shallow spot. Waves generally break when they enter shallow water (there are various conflicting formulas for figuring out exactly how shallow). At beach breaks like San Onofre Bluffs, the best place to wait for a good wave is right over a sandbar, and the sandbars can move around from day to day. One day I decided to stop wondering and find out. I figured I could build a depth sensing sonar into my board and maybe I’d learn a thing or two about the sand underneath me, the dynamics of waves, and maybe even improve my surfing. Along the way I also learned some things about my…from foobarbecue.github.io

• 
  Surfboard2019 · apps.apple.com · ▲66

  Easiest way to see what's going on around you!

• 
  Sonar by Facebook2018 · github.com · ▲152

  Extensible mobile app debugging for iOS and Android

• 
  Sonar – A tiny CLI to see and kill whatever's running on localhostMar 2026 · github.com · ▲204

  CLI tool for inspecting and managing services listening on localhost ports - raskrebs/sonar

• 
  Buoywatch for iOS2024 · apps.apple.com · ▲136

  Real-time surf conditions at a glance

• 
  Blea2018 · kickstarter.com · ▲86

  Electric surfboard

• 
  SurfBuddy2024 · apps.apple.com · ▲95

  Live Surf Competition Scores on your Watch & iPhone

• 
  SimCity, but with Permits▲930

  A free city-building game in your browser. You are the mayor. You know what the city needs. Now get it past the zoning board, the neighbors, the appeals court and the next election.

  Life & fun · 2d ago · permit.petercai.com

• IV
  I've been paying for a rural Tanzanian's education for 10 years▲778

  Life & fun · 15d ago · tanzaniaeducationproject.org

• 
  Bigwords.page – Turn any screen into a sign. The URL is the app▲728

  Turn a phone, tablet or TV into a sign. Type a message and it fills the screen: welcome signs, timers, Wi-Fi passwords and more. No app, no account, free.

  Life & fun · 15d ago · bigwords.page

• 
  Guitoro, a virtual guitar you strum with your keyboard▲573

  Play a free virtual guitar online with your keyboard or by touch. Slow songs down and see every chord, string and strum. Acoustic, classic, electric and bass.

  Life & fun · 9d ago · guitoro.com

• 
  See *almost* any carriers phone settings▲432

  Carrier settings from iPhone, Pixel and Galaxy firmware, decoded and compared: APNs, VoLTE, 5G and Wi-Fi Calling per carrier, and what each build changed.

  Life & fun · 13d ago · carrierexplode.com

• 
  The whole Solar System and every tracked satellite, live in the browser▲407

  Life & fun · 23d ago · space.bl2.net

• 
  Tweet Hunter for Twitter▲930

  AI powered Twitter growth & scheduling for makers

  Growth · 2021 · tweethunter.io

• 
  Vimcal▲883

  Superhuman for Calendar

  Work · 2021 · vimcal.com

• 
  Thursday▲834

  Where remote teams do their socials, no sign up required

  Work · 2021 · thursday.social

• 
  Reform▲767

  Clean-looking, on-brand forms. No code required.

  Dev tools · 2021 · reform.app

• 
  CleanUp.Pictures▲750

  Remove objects and defects from your pictures - 100% free

  AI · 2021 · cleanup.pictures

• 
  Canva Video Suite▲723

  Create, edit, and record stunning videos with ease

  Growth · 2021 · canva.com