Real-time drone (UAV) aerial surveillance with lifeguard alerting

Mechanism

A licensed remote pilot flies a drone on programmed transects over the nearshore zone, watching a live downlink for sharks beneath the surface. On sighting a potentially dangerous shark (white, tiger, bull), the pilot radios lifeguards, who sound a siren and hold or clear swimmers until it moves on. It is a detection-and-warning layer that reduces dangerous overlap in time without removing or harming any animal.

Where it fits

Best on patrolled, accessible surf beaches with reasonable water clarity — the open-coast white-shark context in the parent issue. It complements in-water and tagging measures rather than replacing them. It is largely ineffective in the turbid, post-rainfall estuarine setting where bull sharks concentrate, because sharks there are not visible from the air.

Operating profile

• Covers only patrolled hours and the strip actually overflown.
• Needs licensed pilots (e.g. a CASA Remote Pilot Licence in Australia) and is labour-intensive.
• Grounded by strong wind, rain or storms, and restricted in airspace near airports.
• Detection rates depend heavily on water clarity, surface glare, depth and sea state.

Evidence

Australia runs the largest programs. Across 2020–2024 the Queensland SharkSmart drone trial flew roughly 17,954 flights over 10 beaches; the NSW program now operates around 50 beaches. A peer-reviewed analysis (Huveneers et al., 2024) reported no shark bites at monitored beaches while drones and SMART drumlines were actively deployed — but trial sighting rates were only a few percent of flights, underlining that drones lower risk rather than eliminate it.