Article originally appears on bostonglobe.com 5.13.16

The two companies seeking to launch seaplane service in Boston Harbor say their first flight tests in the harbor took place this week without any significant hitch, in or over the water.

But they’re still going to face some turbulence — on land.

Three politicians who represent South Boston are raising concerns about the effect on their neighborhood’s northern waterfront, citing the amphibious planes’ noise and potential navigation hazards.

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