cat dive15 | grep SHIP | head -n1000 | tail -n1
cat dive16 | grep SHIP | head -n1000 | tail -n1
cat dive17 | grep SHIP | head -n1000 | tail -n1
cat dive18 | grep SHIP | head -n1000 | tail -n1
cat dive19 | grep SHIP | head -n1000 | tail -n1
cat dive20 | grep SHIP | head -n1000 | tail -n1
cat dive21 | grep SHIP | head -n1000 | tail -n1
cat dive22 | grep SHIP | head -n1000 | tail -n1
cat dive23 | grep SHIP | head -n1000 | tail -n1
cat dive24 | grep SHIP | head -n1000 | tail -n1
cat dive25 | grep SHIP | head -n1000 | tail -n1
cat dive26 | grep SHIP | head -n1000 | tail -n1
cat dive27 | grep SHIP | head -n1000 | tail -n1
cat dive28 | grep SHIP | head -n1000 | tail -n1
cat dive29 | grep SHIP | head -n1000 | tail -n1