(CNN) -- Technology dominated the second day of the first Test in Jamaica where England made an early breakthrough after being bowled out for 318 at Sabina Park.
England players await the verdict of the TV umpire during the first Test against the West Indies.
All-rounder Andrew Flintoff was celebrating after New Zealand umpire Tony Hill's decision to give Devon Smith not out from a leg-before appeal in the sixth over was overturned. Smith made six.
Andrew Strauss' England looked to have claimed another success minutes later.
Hill, standing in because Sri Lankan official Asoka de Silva could not obtain a visa, adjudged Ramnaresh Sarwan out after he was pinned on the back foot by Steve Harmison.
However, after a lengthy delay, television umpire Daryl Harper advised that the ball would in his opinion have passed over the top of the stumps and Sarwan survived.
West Indies evenutally ended the day 160 for one wicket with captain Chris Gayle (71 not out) and Ramnaresh Sarwan (74 not out) putting the home side in command a fine unbroken stand.
The technology scare aside, Sarwan batted elegantly and brought up his 50 with a boundary off a below-par Harmison, while Gayle continued his excellent recent form on his home ground..
Earlier Matt Prior celebrated passing 50 for the seventh time in 13 Tests to counteract the loss of Flintoff early on the second morning.
Flintoff failed to add to his overnight score of 43 but Prior struck 64 as the tourists developed their position of 236 for five.
Stuart Broad also departed to the second new ball when he sliced a drive at Jerome Taylor straight to gully.
But Prior's quality at number seven once again came to England's aid as a number of impressive boundaries took him to a half-century from 84 balls.
He was just into his stride when his drive at Sulieman Benn, the hosts' outstanding bowler, proved too close to the giant left-arm spinner, who took the catch moving to his left.
Tail-enders Ryan Sidebottom, unbeaten on 26, and Harmison guided England beyond 300 while last man Monty Panesar left without scoring.