George Miller reached double figures for the season with a brace either side of a brilliantly executed half-volley from Harrison Biggins to send Rovers within two points of the play-offs.
Miller had Kyle Knoyle to thank for assisting his tenth and eleventh strikes of a fruitful first campaign in red and white.
Substitute James McAtee grabbed a late consolation goal for the Mariners, punishing a rare moment of poor quality from the visitors during an otherwise very strong display.
Scroll down for our player ratings.
13. Aidan Barlow - N/A
Made his first league appearance of the season as a late sub. Photo: HOWARD ROE, Howard Roe/AHPIX LTD
4 / 4