Ibra Sekajja gave Vale the lead midway through the first half and the Rocks had Ethan Robb sent off a few minutes before the break.
But they kept battling and Charlie Glasspool scotred for the second game in a row to make it 1-1.
Lifted by the return of midfielder Ben Anderson after almost two years out injured, who came on for the final 15 minutes or so, the Rocks were good value for a point which keeps them in a healthy mid-table spot.
They have two games left – they go to Egham on Saturday (18th) and host Binfield a week later.
See pictures by Lyn Phillips and Trevor Staff on this page and those linked, or all on one page if you are on the Observer app. Get the Rocks latest in the Bognor Observer every Thursday.

5. Lyn Phillips
Rocks v Raynes Park Vale, Isthmian SC division Photo: Lyn Phillips : Lyn Phillips and Trevor Staff

6. Trevor Staff
Rocks v Raynes Park Vale, Isthmian SC division Photo: Lyn Phillips and Trevor Staff

7. Trevor Staff
Rocks v Raynes Park Vale, Isthmian SC division Photo: Lyn Phillips and Trevor Staff

8. Lyn Phillips
Rocks v Raynes Park Vale, Isthmian SC division Photo: Lyn Phillips : Lyn Phillips and Trevor Staff

