Carnival Cruise Line confirmed that an IT issue faced by its fleet earlier this week was felt by guests that were aboard some of its ships.

According to a letter issued by the company’s president, Christine Duffy, the outage is now over and did not impact navigational and safety systems.

“I want to express our appreciation for your patience and understanding as we worked through the technology disruption that took many systems offline the last couple of days,” Duffy said in the statement issued on Tuesday.

“While our navigation and safety systems have always been fully operational, we know that things that impact our guests, like Wi-Fi, the casino slot machines, and the HUB App weren’t available, and it also made the embarkation and debarkation process longer than usual for some of you,” she continued.

She also said that Carnival will refund Wi-Fi’s daily charges for the days when guests were onboard without connectivity.

Duffy added that Carnival’s shoreside and shipboard IT teams have spent the last couple of days dedicated to getting things back online, confirming that the issues are now solved.

“We are dedicated to making your vacation go smoothly, so that your time can be spent doing what you want to do when sailing on Carnival; spending time with family and friends, relaxing and having fun,” she said.

“I have been staying in close touch with our shipboard leaders, who have said, repeatedly, how terrific our guests have been in not letting these distractions impact their vacation.”

Carnival first confirmed IT issues onboard its fleet on Sunday morning, advising guests via a statement on its own website.

The problems led to slower embarkation and disembarkation processes at several ports of call, which caused vessels to sail much later than originally scheduled.

reported on Monday, some ships were only able to leave their homeports after midnight.