Docka Tale

Set out the water at your dock, run a blow or a wake, and read the run-up. The water in front of a dock has a shape. That shape decides what the bank and the deck boards have to take. Docka Tale is a bench where you set that water out by hand and see 👀 what it does to your shore. Pull the sixteen arms of a fetch rose out to the far bank on every bearing. Give each arm its open reach and its mean bed depth. Then cut the section under your dock: face slope, toe depth, berm width and deck height. Pick the shore face from a catalogue of sand, shingle, cobble, boulder, timber crib, steel sheet and plank bulkhead. Add a fringe belt of reeds in front of it if you have one. State a case the way a shore worker would. Write a steady blow with a speed ⚡, a bearing and a duration. Or write a squall, a boat wake or a level 🧗 surge. The bench solves the geometry and shows the figures: - Effective fetch, wave height and period - Wavelength, steepness and breaking depth - Iribarren number 🔢 of your slope - Run-up on the bank and splash up the piling - Millimetres of deck left dry Every figure is drawn to scale against your own section. You see 👀 the still-water line, the run-up and the margin that remains, so you do not have to read them off a table 📋. Exposure signatures explain what each result costs if it is left alone. They cover a loose hoop, a strike scar, splinter wear, a belt gap and a chafed rope. Each one states its cause, the figure that predicts it and what it does to the post. Docka Tale keeps as many docks as you set out. Each dock has its own rose, its own section and its own cases. A station on every bearing lets you hold a photograph of the calm beside one taken after a blow, so you can compare ⚖️ the observed rise with the computed one. The app 📱 works offline 📴. You can switch lengths between metres and feet, and speeds between metres a second and knots. Docka Tale is a bench, not a forecast and not a safety assessment.