Taranto was relatively deep, on the order of 100' IIRC. Pearl was 40'. No
standard aerial torpedo would operate properly in that harbor. SOOOO, the
Japanese developed one that would.

R / John

"John Mullen" wrote in message
...
"John Carrier" wrote in message
...
I think the single biggest undone defense would have been torpedo nets,
but
the reality was no one thought torpedoes could be used effectively in
Pearl
Harbor's shallow waters.

So news of Taranto had not reached the US then? Because it had obviously
reached Japan ok....

John