Overcoming Accessibility and Logistics Challenges: Integrating MBES and SSS with UAVs

We present the integration of a lightweight multi-beam echosounder (MBES) and side-scan sonar (SSS) with a UAV platform. A custom dual-hinge foldable mount and dedicated data-logging workflow allow the MBES head to be georefer-enced directly, achieving accuracy comparable to established SBES and USV surveys while offering superior spatial resolution. Field tests in Latvian lakes and rivers demonstrate feasibility, highlight logistical advantages, and show complementary roles of MBES and SSS. This work outlines a practical approach to UAV-based hydrography and expands the toolkit for shallow-water surveying.