Examples:

• Just enough to stay above water.
• Both, to keep my head above water.
• John kept his head above water.
• Six months, that's all I need to get my head above water here.
• After all, this is a small part above water battle ships.
• I've never seen anything like that above water, much less below.
• The new boot polish can be used both under and above water.
• UNHCR was, in budgetary terms, barely keeping its head above water.
• These two peaks held their heads above water during several of the preceding inundations.
• Wrong. I don't understand anything above water.