| 摘要 |
The beacon is fastened to a container or to a group of containers by an anchoring cord (16) of a defined length and includes means ensuring, from a certain depth of immersion, that the beacon floats free with its directional acoustic emitter turned towards the surface of the water, the beacon remaining anchored by the said cord (16) to the said container or to the said group of containers. Application to marking containers of toxic products on sea beds. <IMAGE>
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