Lloyds of London, the world most famous society of shipping insurers. On the right hand side of the you can see the lutine bell that was rung in the event of a major loss.
Lloyds reported during the period 1961 to 1971 seventy ships disappeared with trace with the loss of over a thousand lives.
Two general truths emerge from reseach into missing ships. Firstly, it is ususally smaller ships that disappear and secondly "Ship-Jacking" is rare, particlarly with ships that are registered because these registrations, which are carried on there main beams can be traced.