Please Help: gst querry

My firm in Mumbai has a Tug (registered in Mumbai) but plying in Gujrat + the firm also provides services to foreign ships coming to India for which foreign co. pays to them in Fgn Exchange – Their total turnover (for both activities) is app. Rs.70 Lakhs – will they come in Composition scheme – if yes what GST to be paid?? – If not what cgst sgst or igst to be paid ??