| 21. | Since the light helicopters fly low, it's not unusual to lose radio or radar contact.
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| 22. | That evening, she surfaced once again and soon made radar contact with a good-sized target.
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| 23. | The four had been heading from Japan to Alaska when radar contact was lost Sunday.
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| 24. | Shortly after midnight on 21 November, the submarine made radar contact with the fleet at.
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| 25. | While no definitive submarine attacks were made, there were many " suspicious " radar contacts.
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| 26. | On 31 January, the boat made another radar contact on two cargo ships under escort.
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| 27. | The reported contrail was never verified by visual or radar contact, the Pentagon statement said.
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| 28. | Radar contact with the plane was lost Tuesday afternoon.
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| 29. | Different geometric shapes and colors are now used to identify different types of radar contacts.
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| 30. | At 4 : 21 p . m ., radar contact with the MD-83 was lost.
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