isTidallyLockedTo

Given a predicate that represents a relationship or action between entities, generate a one-sentence description explaining its meaning.  
# Instructions
Focus on describing the relationship, not the entities themselves. 
# Response Format
Begin the description with \' Indicates...\'

Predicate: isTidallyLockedTo

Indicates that one object's rotational period matches its orbital period around another object, so the same side always faces that other object.