Add new TPU standard (Italy)

Our customers in Italy have informed us that the Italian Hydrographic Office has added another national standard for TPU that is a bit more tight than Exclusive order. The new standard has two different values for

1. Depth (THU): Rather than 1m they are specifying 0.5 m

2. Depth (TVU): Rather than a=0.15 m they specify a=0.1 m

Attached is the spec. See page 25 for the table