Several manufacturers are now making hand held VHF Marine Band radios that are Class-D DSC qualified. These radios all have internal GNSS receivers. Here is a quick list of models with images and links to more information:
Standard-Horizon HX870
I believe the HX870 was the first hand held DSC radio to be introduced and came out c.2015. More details at
http://standardhorizon.com/indexVS.cfm?cmd=DisplayProducts&ProdCatID=85&encProdID=F074C5751E79473FCD911FF7D468A2E1&DivisionID=3&isArchived=0
Icom M93D
A recent new model from Icom is the M93D. More details at
http://www.icomamerica.com/en/products/marine/handhelds/m93d/default.aspx
Simrad HH36
The HH36 is a recent model from Simrad. More information at
https://www.simrad-yachting.com/simrad/type/vhf-radios--ais/vhf-hh-radiohh36dscuscan/
[See more radios below.]
VHF Marine Band Hand Held Radios with DSC
Re: VHF Marine Band Hand Held Radios with DSC
Uniden MHS335BT
The new Uniden MHS335 DSC Class D radio is also capable of sending text messages. More manufacturer information at
https://www.uniden.com/shop/communication/marine-radios/6-watt-class-d-floating-handheld-vhf-marine-radio/
This radio is also being sold under the West Marine brand as the West Marine VHF470. The radios are the same except for case color or other minor variations. See
https://www.westmarine.com/buy/west-marine--vhf470-floating-dsc-radio-with-gps--18736397?recordNum=3
The new Uniden MHS335 DSC Class D radio is also capable of sending text messages. More manufacturer information at
https://www.uniden.com/shop/communication/marine-radios/6-watt-class-d-floating-handheld-vhf-marine-radio/
This radio is also being sold under the West Marine brand as the West Marine VHF470. The radios are the same except for case color or other minor variations. See
https://www.westmarine.com/buy/west-marine--vhf470-floating-dsc-radio-with-gps--18736397?recordNum=3