There was a proposal for a new series called Marine Views to be published by W.B. Cooke which led Turner to make six further watercolours thought to have been painted between 1822 and 1824.  Unfortunately the series was not published but it is thought likely that the list included the following paintings - the first two of which were in the BG Windus collection:
Sun-rise. Whiting Fishing at Margate
A Storm (Shipwreck)
Twilight – Smugglers off Folkestone Fishing Up Smuggled Gin
Fish-Market, Hastings
Folkestone from the Sea and
Dover Castle
Also named as watercolours to be included in the volume were:
The Ed[d]ystone Light House
Neptune’s Trident (frontispiece)
Further information on the proposed series of Marine Views here

Sun-rise. Whiting Fishing at Margate and A Storm (Shipwreck)  at Cooke's Gallery 1823

In both 1823 and 1824, W B Cooke exhibited a number of works from the proposed Marine Views at his newly refurbished picture gallery at 9 Soho Square, London. The 1823 exhibition included three of the watercolours and the placement of the following advertisement in The Literary Gazette not only confirms the presence of Sun-rise. Whiting Fishing at Margate but also suggests that it was a great highlight:

Exhibition: 9 Soho Square - Two superb drawings by J.M.W. Turner R.A. will be added to this splendid collection on Monday next, May 19th and will be placed in the centre of the rooms. A STORM and A SUN-RISE. These powerful productions, from the pencil of Mr Turner (being just finished), will continue a few weeks only for public inspection…. Open from 10 until dusk, admittance 1s.

Sun-rise. Whiting Fishing at Margate

Sun-rise. Whiting Fishing at Margate. Watercolour, 1822 Engraved 1825 as ‘Marine Views. Plate 2’ exhibited at Cooke’s Gallery in 1823 (no number, added during the course of the exhibition as ‘Margate. Sunrise’, but advertised as ‘A Sun-rise’.

On the left, far in the distance, a guardship announces the dawn by firing its morning gun, while in the foreground, fishermen have already struck lucky and are excitedly hauling in a plentiful catch. Through the cluster of small vessels, the town itself can be made out. Captain Hooper’s Mill dominates the skyline, while to the right, the pier, the light-house and the entrance to the harbour are all visible.
Sold at Sotheby's July 2019

A Storm (Shipwreck)

A Storm (Shipwreck). Watercolour, 1823 Exhibited at Cooke’s Gallery in 1823 (no number, added during the course of the exhibition as ‘Shipwreck’, but advertised as ‘A Storm'.

A view of rough sea with a shipwreck in centre, where the passengers scramble on the deck as waves overturn the ship, jagged rocks in right foreground, mast of another ship visible, suggesting the rest of vessel now submerged, small rowing boat to left with rescued passengers.

British Museum notes: in Turner's many paintings of shipwrecks nature was nearly always the main protagonist and hope was absent, except perhaps in redemption after death.
Further information here