Goals from Tommy-Lee Higgs, MoM Matt Burgess and Harvey Whyte eased Robbie Blake’s men into the quarter-finals, in which they will visit Littlehampton.
The winners of that game will face Hastings in the semi-finals, with Horsham playing Steyning in the other semi.
It was Bognor’s fifth win out of five played this year – they are also in excellent form in the Isthmian premier.
See pictures from Lyn Phillips and Trevor Staff from Whitehawk-Rocks by scrolling down or through the linked pages here.
1. Whitehawk v Rocks pictures by Lyn Phillips and Trevor Staff (10).jpg
Action from the Rocks' Sussex Senior Cup last-16 win at Whitehawk Photo: Lyn Phillips and Trevor Staff
2. Whitehawk v Rocks pictures by Lyn Phillips and Trevor Staff (5).jpg
Action from the Rocks' Sussex Senior Cup last-16 win at Whitehawk Photo: Lyn Phillips and Trevor Staff
3. Whitehawk v Rocks pictures by Lyn Phillips and Trevor Staff (11).jpg
Action from the Rocks' Sussex Senior Cup last-16 win at Whitehawk Photo: Lyn Phillips and Trevor Staff
4. Whitehawk v Rocks pictures by Lyn Phillips and Trevor Staff (14).jpg
Action from the Rocks' Sussex Senior Cup last-16 win at Whitehawk Photo: Lyn Phillips and Trevor Staff