Why an infantry nano-drone has little naval scouting reach

Why not use infantry nano-drones to scout from warships?

The example's 500-1,000-metre range is too short for the wide-area naval scouting role being proposed.

Infantry patrol drones are proposed for use aboard ships. The example offered has a range of roughly 500-1,000 metres from its operator. Some warships under discussion are nearly 300 metres long, making that radius small relative to the platform itself. The drone would remain close to the ship rather than providing a distant scouting picture. The limitation concerns the proposed reconnaissance role, not every possible use for a small drone aboard ship.