To act as a flagship for.
The most important one out of a related group.
The ship occupied by the fleet's commander (usually an admiral); it denotes this by flying his flag.
The ship regarded as most important out of a group, e.g. a nation's navy or company's fleet.
To start out.
To intercept.
To avoid the undesirable consequences of; prevent.
To turn away from the wind.
To begin moving away.