Commander Sarah West was a headline appointment when she became the first female commander of a frontline warship in the 500-year history of the Royal Navy.
She described taking on the role as the greatest achievement of her career, adding: "I'm looking forward to taking HMS Portland on operations with a professional and focused team."
Earlier this year she said her work commitments made it difficult to have a relationship.
She told the Daily Mirror: "Years at sea probably explains why I'm single. But every person in the military makes sacrifices."
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Susannah Mushatt Jones from New York is known as Tee, short for auntie, to her 100 nieces and nephews.
The tweet said: "Our lionesses go back to being mothers, partners and daughters today, but they have taken on another title - heroes."
The BBC has agreed to pay for TV licences for viewers over the age of 75, the Culture Secretary John Whittingdale has confirmed.