Boeing Co. agreed to sell its Jeppesen navigation unit and related assets to Thoma Bravo for $10.6 billion in cash, handing the planemaker funds it can use to lighten its debt load.

Boeing has said it will sell Jeppesen, ForeFlight, and more to Thoma Bravo for $10.55B as it shifts focus to core aerospace and defense operations.

Chicago private-equity firm Thoma Bravo is spending $10.55 billion in cash to buy several digital aviation assets from Boeing, including Jeppesen, a well-known maker of maps and navigation charts.