'Never forgotten'published at 13:16 Greenwich Mean Time 19 February
Mr Doherty says the impact of the attack was "felt right through our organisation".
He says it will "never be forgotten".
Summary
The Omagh Bombing Inquiry is examining whether the single worst atrocity of the Troubles could have been prevented
Twenty-nine people, including a woman expecting twins, were murdered in the Real IRA attack on 15 August 1998
This is the fourth week of hearings
'Never forgotten'published at 13:16 Greenwich Mean Time 19 February
Funeralspublished at 13:14 Greenwich Mean Time 19 February
Mr Doherty says the NIFRS welfare department coordinated critical incident debriefs.
He says many officers attended funerals of victims.
Contacting loved onespublished at 13:13 Greenwich Mean Time 19 February
The lack of communication caused by the bomb caused "distress" among responders, who couldn't get in touch with loved ones, Mr Doherty says.
In 1998 mobile phones "weren't common" but the fire service did have one and it became a "valuable welfare tool" for officers to contact families.
Officers personally affectedpublished at 13:13 Greenwich Mean Time 19 February
A second officer's nephew was killed, a third's son was seriously injured.
He says many people were personally affected with friends and family injured.
Tragic lossespublished at 13:12 Greenwich Mean Time 19 February
Some emergency services personnel were excused from the operation to search local hospitals for missing family members, Mr Doherty says.
Some firefighters "tragically" lost relatives - one lost his granddaughter and some of his other family members were injured.
'Magnitude'published at 13:12 Greenwich Mean Time 19 February
He says the incident was officially handed over to police at 21:59.
He says as the incident slowed the "magnitude" began to set in for officers.
"Many officers searched through the rubble not knowing if they would find friends or relatives."
Stop messagepublished at 13:09 Greenwich Mean Time 19 February
Eventually a stop message was transmitted to indicate no additional fire service resources were needed.
This was sent at 19:13.
Uncertainty over second devicepublished at 13:08 Greenwich Mean Time 19 February
He says that a short time later responders were assured that there was no second device confirmed.
He says a decision was taken despite the uncertainty to resume operations.
He says a thermal imaging camera proved "invaluable" to search of hidden fires and casualties in the rubble.
Suspected second bombpublished at 13:07 Greenwich Mean Time 19 February
Police then informed responders that a second bomb was suspected, Mr Doherty says.
"At this point, and since any remaining undiscovered individuals were likely deceased all personnel evacuated to the control point."
More help arrivespublished at 13:07 Greenwich Mean Time 19 February
Mr Doherty says more fire trucks arrived as search efforts "intensified".
He says that firefighters were also deployed to establish the number of dead and to note their locations.
Searching for peoplepublished at 13:05 Greenwich Mean Time 19 February
Fire service personnel searched buildings, beginning with the upper part of the street where people might be less injured.
Many people had "escaped or been dragged out" of buildings, Mr Doherty says, but firefighters assisted many others.
Rescuing casualtiespublished at 13:04 Greenwich Mean Time 19 February
Mr Doherty says that fire officers provided first aid, "but focused on their critical duties" of rescuing casualties.
He says that a hose reel used to control the small fire was left accessible in case of further fires.
Initial findings at the scenepublished at 13:03 Greenwich Mean Time 19 February
Mr Doherty says initially a small fire was found in the wreckage of a vehicle believed to be carrying the bomb, a fire in the roofspace of a nearby building and hundreds of casualties.
There was an "unknown number" of fatalties, trapped people and collapsed structures.
'Hundreds of casualties'published at 13:01 Greenwich Mean Time 19 February
He says that the fire officers who attended the scene were "met by hundreds of casualties".
He says they were screaming, distressed and suffering from injuries.
He says it was immediately clear that more help was needed and that a call was put out for help from surrounding fire stations.
Call from policepublished at 13:01 Greenwich Mean Time 19 February
On the day of the bomb, the fire service received a call from the police to report of a device at the courthouse in Omagh, Mr Doherty says.
They sent two fire appliances from Omagh fire station and two supervisory officers.
One was off duty but assisted with the response.
Firefighter's reportpublished at 12:59 Greenwich Mean Time 19 February
Mr Doherty says that he did not attend the scene himself.
He says that his evidence will be based on a report compiled by a former officer shortly after the incident.
'Unimaginable tragedy'published at 12:58 Greenwich Mean Time 19 February
Mr Doherty extends sympathy on behalf of the fire service to those impacted by the bomb.
He describes it as an "unimaginable tragedy".
Fire commander evidencepublished at 12:57 Greenwich Mean Time 19 February
Image source, Omagh Bombing InquiryImage caption, David Doherty is the Northern Ireland Fire and Rescue Service area commander for the western area command.
We are now going to hear from David Doherty.
He is the Northern Ireland Fire and Rescue Service area commander for the western area command.
Gave up work earlypublished at 12:49 Greenwich Mean Time 19 February
Rodney says he had to leave work early.
He says he retired when he was 55.
"Every bit of it is as a result of the bomb."
Career plans changedpublished at 12:49 Greenwich Mean Time 19 February
Rodney tells the inquiry he had plans to become a psychiatric nurse but he "couldn't settle in a classroom of people or go to college".
"I couldn't be closed in for that length of time."
He became an auxiliary nurse instead, and says he enjoyed his work.