After the Strait of Hormuz had reopened, only 25 ships exited Thursday and traffic quickly slowed again.
Nearly 500 ships and 20,000 crew members have been stuck in the Persian Gulf for months.
Experts say it will take months for ship traffic to normalize due to safety concerns and uncertain confidence in the ceasefire.
AI-generated summary was reviewed by a CNN editor.
Even before Iran announced Saturday that the Strait of Hormuz was again closed, ship operators had pulled back on sailings through the critical channel.
