Assembly and method for installing a subsea

An assembly (400) for installing a subsea cable (304), the assembly comprising a submersible apparatus (200) and a submersible cable holder (300) comprising the subsea cable, the subsea cable being connectable to the submersible apparatus through a connector (202) for transmission of electric power and/or data to the submersible apparatus; wherein the assembly is configured to install the subsea cable while the submersible apparatus is electrically powered through said subsea cable. And a method for installing a subsea cable (304) with a submersible apparatus (200), the method comprising: supplying electric power and/or transmitting data through the subsea cable to the submersible apparatus; and laying the subsea cable in a sea with the submersible apparatus.