"It is a big test of this team - that is why they are called Tests - and we have to see if the systems we are putting in place will stand up to what Ireland has to offer, " said Crowley, whose side warmed up for the clash with a 21-13 win over Portugal on Saturday.

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"There is not enough time to test to see if this system is rigorous enough to work, " says Bernard Clarke, a CML spokesman.

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However, its baseline version of the interceptor is already quite capable, which is why the Navy will conduct a test this spring to see how it fares against a Trident ballistic missile flying a longer, faster trajectory than the service currently is postured to counter.

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The auto industry has been working on so-called V2V technology for a long time but this is the first large-scale test to see how well it works in the real world.

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