UK subsea cable protection provider Tekmar Group PLC (<a href="https://www.londonstockexchange.com/stock/TGP/tekmar-group-plc/company-page" target="_blank">LON:TGP</a>) has sealed a deal to acquire the remaining 20% stake in Ryder Geotechnical Limited, a provider of expert geotechnical design and consulting services to the offshore oil and gas and renewables sectors.