GL: Big boats rule

[handy97885 at aol.com]

John Seahorse says:
Big? boats with big tanks rule. A friend has an 80-footer which used to 
bunker 10,000? gallons. He is lamenting the fact that the PO reduced that by 
1500 by installing? a black tank. 
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What's a black tank? and whatza??PO? Petty Officer? Purchase Order? P----d Off?
John S/V Second Love????????????