Personnel location monitoring

A system, comprising:

• a plurality of portable wireless devices associated with entities on an offshore unit;
• a plurality of stationary wireless devices associated with the offshore unit;
• a database storing a dimensional map of the offshore unit;
• a communication interface that when in operation communicates with the plurality of stationary wireless devices and with movable equipment on the offshore unit;
• and
• a programmable control device in communication with database and the communication interface, the programmable control device when in operation:
• tracks, in the database, locations of the entities in the dimensional map of the offshore unit by receiving at least wireless monitoring from the portable wireless devices associated with the entities;
• obtains dynamic operating parameters of the movable equipment operating on the offshore unit;
• calculates a dynamic zone that changes location on the dimensional map by moving dynamically across the dimensional map of the offshore unit with movement of the movable equipment across the offshore unit based on operating parameters of the movable equipment;
• detects a conflict of at least one tracked location of an entity from the locations of the entities as interfering with the dynamic zone of the movable equipment;
• and
• outputs an indication of the conflict.

A tangible, non-transitory computer readable medium configured to store instructions executable by a processor to:

• receive first position data associated with a human within a hazardous environment;
• receive second position data representative of a work zone associated with a movable equipment within the hazardous environment;
• compare the first position data to the second position data to detect that the human is within the work zone;
• receive an indication of the movable equipment being commanded to move from a first location in the work zone to a second location in the work zone when the human is within the work zone;
• and
• in response to detection that the human is within the work zone and the indication of the movable equipment being commanded to move from the first location in the work zone to the second location in the work zone when the human is within the work zone, generate an alert associated with the hazardous environment or generate a control signal to alter movement of the movable equipment.