Roscommon Civil Defence was called to assist when a cruiser and a crew of four raised the alarm north of Rooskey yesterday.
Officers launched a boat from Kilglass and following an assessment, it was deemed unsafe and not practical to move the boat.
Two female occupants were removed to Kilglass pier and transferred to the marina in Tarmonbarry by jeep.
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The owner of the boat stayed on board for the night with his grandson with regular close contact with the civil defence.
A larger boat is being brought to the area to tow the boat to this morning.