isiziba - Boating LogBook

isiziba is a boating logbook and anchoring companion for iPhone and iPad. Log every passage, keep your vessels on file, watch your sea time add up, and work out how much anchor rode to let out. It all stays on your own device and works offline, with no account and no subscription.

YOUR LOGBOOK AT A GLANCE Open isiziba and your totals are waiting: trips logged, hours at sea, distance and expenses. From there it's one tap to the Trip Log, your Sea-Time Summary, a new vessel or Anchor Rode, with Record a New Trip right below.

LOG EVERY PASSAGE Record each trip in as much or as little detail as you like: vessel and role, departure and arrival, distance, engine hours, fuel and water, conditions and the skipper's sign-off. Only the basics are required, and a Minimal trip takes seconds. Duration, distance, engine run time and fuel used work themselves out. Missing an activity or a crew role? Add your own to the list and it's there next time.

YOUR SEA TIME, SUMMED UP Hours, miles, tidal miles and days at sea add up by themselves, along with qualifying passages, offshore trips, overnight passages and your time as skipper. Carry over earlier experience so the totals show your whole time at sea.

YOUR FLEET, YOUR DATA Save each vessel once (hull, dimensions, engines, tanks, registration and MMSI), then pick it for every trip. Metres or feet, kilograms or pounds: switch units and your figures convert. Add your own hull materials, engine makes, fuel types and more, and they're ready for every vessel.

ANCHOR WITH CONFIDENCE Enter the tides from your tide table, your depth and your scope, and Anchor Rode works out how much rode to let out for the whole stay, allowing for the highest water. Pick a saved vessel and its transducer, bow roller and draft fill in for you. Work in metres or feet and switch at any time.

SEE THE TIDE BENEATH YOU The Depth Profile shows how the water rises and falls from arrival to departure, with your draft drawn to scale. Your Numbers at Arrival explains every figure: what you entered and what was calculated.

KNOW BEFORE YOU TOUCH BOTTOM Add your boat's draft and Anchor Rode checks the whole stay, not just your arrival. If low water will leave too little water under your keel, the calculator warns you in plain words, with the time of low water and how far short you would be, and the Depth Profile turns the curve red where the boat grounds.

PRIVATE, OFFLINE, YOURS No account, no cloud, no tracking, no ads and no subscription. Your logbook stays on your device and works with no signal at all. Make a backup file whenever you like and keep it wherever you trust.

GOOD TO KNOW isiziba is a recording aid and reference tool, not a substitute for proper seamanship. Anchor Rode estimates tidal height from the tide times and heights you enter, so always cross-check official tide tables and charts. Logbook entries are your own records; isiziba is not affiliated with any training body or authority.

The name comes from the isiZulu for a deep pool, a fitting name for an app that lives on the water.

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