ClipArt ETC
An illustration of military personnel measuring close intervals.

Close Military Interval Measurement

An illustration of military personnel measuring close intervals.

An illustration of military personnel measuring intervals.

Military Interval Measurement

An illustration of military personnel measuring intervals.

An illustration of military personnel measuring normal intervals.

Normal Military Interval Measurement

An illustration of military personnel measuring normal intervals.

Signal for an interval.

Signal interval

Signal for an interval.