Pompey have signed defender Sean Raggett on a season-long loan from Norwich.
There is no option for the player – who had a stint at Rotherham last term – to be recalled by his parent club.
Blues boss Kenny Jackett said: “The additions of Sean and Paul Downing have strengthened our defensive options and give us good competition in that area.
“He’s played all of his career as a left-side centre-half and is someone I’ve followed since his non-league days.
"He’s a very determined person and is just coming into his prime. He’ll be looking at this as a big opportunity to progress."
“We’re delighted to bring him to Pompey and very much look forward to working with him next season.
“He’s a very determined person and is just coming into his prime. He’ll be looking at this as a big opportunity to progress.”
Raggett came through the ranks at Dover and made more than 100 appearances before signing for Lincoln in the summer of 2016.
He has played twice for the Canaries and appeared alongside fellow Blues newcomer Ryan Williams while on loan at Rotherham last season.
🎥 You may remember @SeanRaggett from when he scored an FA Cup winner against @BurnleyOfficial for @LincolnCity_FC 👀— Portsmouth FC (@Pompey) June 27, 2019
Here’s hoping for more memorable moments in a #Pompey shirt 🤞pic.twitter.com/iAvYbrpWaH