External anchoring harpoon for aircraft

An external anchoring harpoon for an aircraft for co-operating with an anchor grid of a platform in order both to make landing of the aircraft on the platform safe and also to hold the aircraft down on the platform, the external anchoring harpoon being external to the structure of the aircraft and comprising:

• a frame configured to be connected to the aircraft;
• a harpoon head configured to become anchored in the anchor grid;
• and
• a deployment device for deploying the harpoon head;
• wherein the deployment device comprises:
• flexible connection means having a first end and a second end and connected via the first end to the harpoon head;
• a movement device for moving the flexible connection means and connected firstly to the frame and secondly to the second end of the flexible connection means;
• a main telescopic strut provided with a third end and a fourth end, and connected via the third end to the harpoon head and via the fourth end to the frame;
• and
• at least one secondary telescopic strut provided with a fifth end and a sixth end and connected via the fifth end to the harpoon head and configured to be connected via the sixth end to the aircraft.