 Arriving off the island 24 March in advance of the landing group, the minesweeper began her critical job of sweeping the approach and transport areas.She underwent air attack 28 March and with the main assault 1 April moved to screening duties.As the Japanese hurled wave after wave of suicide planes at the invasion fleet in a desperate attempt to stop the capture of Okinawa, the crew of the "Impeccable" frequently manned their guns for long periods.