Automatically scan a 20 m radius and build an initial 3D underwater map with bass and structure context in about 2 minutes.
Live scan proofDepth, structure and cast-zone context
Reserve for $1
The hunt for a personal best begins before the first cast. Beginners often guess. Serious anglers scout first. They study satellite images, contour lines, access points, weather, water temperature and seasonal movement before they ever reach the bank.
Once they arrive, the scouting continues: walking shoreline, probing depth, casting sonar and piecing together structure one pass at a time. Big fish are rarely sitting in the obvious place, and from shore those overlooked edges can take precious fishing time to find.
Kastave scans reachable water from shore, maps depth and structure, reads water conditions, and turns the scan into safer structure-focused and risk-reward cast options.
It cannot promise your next PB. It gives your judgment more information and gives you more time to fish.
Real freshwater structure is messy: wood, grass, rock, bottom transitions and fish all share the same water below the surface. This prototype workflow shows how sonar returns can become a point cloud and an interactive terrain model with bass and structure context.
Real bank-side footage from a live scouting session: launch, phone control and the prototype moving through reachable water.
Prototype footage. Product appearance and functionality may evolve before launch.
Engineers, anglers and field testers building a smarter way to read freshwater.
Kastave began on the bank, not in a lab: a passionate angler and a sonar expert saw the same gap between underwater science and real fishing decisions. Chester knew how to read water; William knew how to read echoes, yet still struggled to find fish in practice. Together with Leo's engineering depth, they built Kastave to help anglers find fish faster.
Kastave began on the bank, not in a lab.
Chester has always been passionate about fishing. He knew how to read a spot, where fish were likely to move, and how small changes in timing, depth, and position could decide whether a session ended with a catch or nothing at all.
William, on the other hand, was a sonar expert. With a PhD background in underwater acoustic sensing, he understood signals, echoes, and what happens beneath the surface from a technical point of view. But when Chester took him fishing, something funny kept happening.
They would fish the same water, often from nearby spots, under the same weather and conditions. Chester could find fish and get bites, while William repeatedly failed to catch anything. For William, it was frustrating. He understood the science of seeing underwater, yet in real fishing, he still could not reliably know where the fish were.
That contrast became the starting point of Kastave.
William realized that professional sonar knowledge was still too far away from everyday fishing decisions. Chester realized that many anglers face the same problem: they spend hours guessing where fish are, relying on experience, luck, and trial and error.
Together, they asked a simple question:
Can we build something that helps anglers find fish faster?
To turn that idea into a real product, they brought in Leo, a mechanical engineering PhD from PSU. With William's sonar expertise, Chester's fishing experience, and Leo's engineering ability, Kastave was created to make underwater information easier to understand and more useful for every fishing enthusiast.
Angel User Community
A private, non-sales space for serious bank anglers to share real shore-fishing needs, follow product progress, and help guide the choices that shape Kastave before launch.
Reserve for $1 today to secure the $799 early-access total price when final checkout opens.
$1 reserves your pre-order offer toward the $799 early-access total. You pay the remaining $798 only if you choose to complete final checkout. This is not the final product purchase.
After the $1 reservation payment, confirmation is sent by email. Final purchase and fulfillment happen later, and only after you choose to complete the final checkout.
Your $1 pre-order reservation secures the $799 early-access total price, reduced from $999. The $1 is credited toward the total, leaving $798 only if you choose final checkout. Save $200
No. The $1 reservation is not the final product purchase. We will email you before final checkout, and you can decide whether to complete the order.
Yes. The reservation is refundable before final payment collection if you change your mind before launch.
The standard price is $999. Customers who reserve for $1 during this campaign can complete final checkout at a $799 total price, saving $200. Because the $1 reservation is credited toward that total, the remaining balance is $798. We will not charge the $798 balance automatically.
Traditional 2D sonar shows signals that anglers still need to interpret. Kastave is designed to turn underwater readings into a clearer 3D structure view for fishing decisions.
Kastave is built for anglers searching banks, seawalls, canals, rocky shorelines, grass edges, drop-offs, submerged wood, and other structure-focused water.
No device can guarantee a catch. Kastave helps you read structure more clearly so you can choose better casting targets and reduce blind searching.
Yes. The intended workflow pairs the device with a mobile app for 3D scan viewing, saved maps, structure points, water conditions and trip history.
Yes. Kastave is designed as a portable scan system for bank anglers, kayak anglers, and small-boat users who want structure information without a complex installed setup.
We are currently validating field performance, app workflow, and production planning. Early customers will receive launch updates before final purchase and fulfillment.
Shipping regions will be confirmed before final checkout based on logistics, taxes, and service coverage. Early customers will receive updates as launch details are finalized.
You can reserve through Stripe or PayPal using the checkout buttons on this page.
Email us at info@kastave.com.