line judge
Court boundary observer
A line judge is an official in sports who watches boundary lines to determine whether balls or players are in or out of bounds.
In tennis, line judges call shots that land near the lines.
In American football, the line judge positions along the line of scrimmage to watch for violations.
The line judge signaled the ball was out.
Standard for comparison
- faultImperfection or blame
- foot faultIllegal serve positioning
- sidelineSecondary business pursuit
- callContact by phone
overrule · challenge · out · in · umpire · chair umpire · ball mark · clay court
Secondary business pursuit
- antennaBroadcast signal receiver
- foot faultIllegal serve positioning
- serveAttend to needs
- liberoDefensive volleyball specialist
rotation · touch · out of bounds · signal · flag · whistle · substitution · rally
Sports rule enforcer
- umpireSports match official
- officialAuthority-sanctioned person or status
- callContact by phone
- signalMessage-conveying cue
decision · ruling · judgment · positioning · sightline · flag · whistle · overrule
Secondary business pursuit
- touchlineField's side boundary
- offsideIllegal forward position
- flagCloth symbol or signal
- assistant refereeSupporting match official
out of bounds · boundary · chain gang · first down · end zone · punt · kickoff · inbounds
Active mental awareness
- vigilanceState of keen awareness
- observationAttentive watching or remark
- concentrationSustained single-minded attention
- attentionFocused mental awareness
tracking · anticipation · reaction time · awareness · peripheral vision · positioning · quick decision · split-second
baseline
Standard for comparison
- faultImperfection or blame
- foot faultIllegal serve positioning
- sidelineSecondary business pursuit
call · overrule · challenge · out · in · umpire · chair umpire · ball mark · clay court · Cyclops
sideline
Secondary business pursuit
- antennaBroadcast signal receiver
- foot faultIllegal serve positioning
- serveAttend to needs
libero · rotation · touch · out of bounds · signal · flag · whistle · substitution · rally
referee
Sports rule enforcer
signal · decision · ruling · judgment · positioning · sightline · flag · whistle · overrule · infraction
sideline
Secondary business pursuit
assistant referee · out of bounds · boundary · chain gang · first down · end zone · punt · kickoff · inbounds · down marker
alertness
Active mental awareness
- vigilanceState of keen awareness
- observationAttentive watching or remark
- concentrationSustained single-minded attention
attention · tracking · anticipation · reaction time · awareness · peripheral vision · positioning · quick decision · split-second · accuracy
- tennisace, serve, forehand, backhand, volley
- Sports Officialsreferee, ref, umpire, official, match official
- tennis peopleplayer, umpire, referee, ball boy, ball girl
- adjudicatorsarbiter, arbiters, arbitrator, arbitrators, referee
- football officiatingreferee, penalty flag, yellow flag, false start, offside
- officiatingreferee, umpire, official, ref, head referee
line judgehead referee
Senior game arbiter
chair umpire · crew chief · match referee · field judge · ball boy
line, judge, outline, lineup, outlined, outlining, linear, linesman, lineman