At $2 million apiece, the craft poke out only a foot above water and can carry 12 tons of drugs.
The Pentagon wants more control over NATO there in light of Taliban resurgence.
Incentives likely to include large payments to soldiers now working as translators.
Improved security has boosted optimism, but US commanders want to be assured it is "irreversible."
The attack has raised concerns in Pakistan about the United States' increased willingness to take unilateral action in the war on terror.
A key component is likely to be more troops, but the strategy must go beyond that, experts say.
Recent events suggest both Tehran and Washington may be willing to engage in dialogue.
Top US commander in Iraq said Thursday he is likely to recommend further drawdowns before leaving his post in the fall.
Britain and the Netherlands agree to longer tours, delaying a bigger US role in the mission.
The US is increasingly out of sync with Pakistan's newly-elected government, say analysts.