Key differences between the versions of Portable Navigator.

Features PN Free PN Survey 5 PN Logger
Vector Charts
Raster Charts and Chartlets
Multiple Chart Views  
Survey track line layout tools  
Automatic track line Waypoints  
Chart Waypoint editing with Multimedia WPs
Animated Waypoints (Night Vision)    
Variable Vector Chart Viewing Angle
Vector Chart Head Up while navigating
Perspective Vector Chart View    
Adjustable Viewpoint Altitude    
Selectable Perspective Viewpoint    
Chart Look Ahead Mode    
Skeletonised Playable Position Logs
Survey Programmable Text Log  
Data trend plot from Text Log with data zoom  
Large Data Plot window with measure tools  
Remarks / Screen shot Logs (uses MS Word)  
Playable AIS Logs  
AIS RADAR Display and Target Database  
Lights on AIS target vessels (Night vision)    
Chart Making Tools
Tidal Atlases and Course to Steer
COM Ports Supported 1 4 (Nmeapro) 4 (Nmeapro)
Towed Transducer Geometry  
Transducer array boom geometry for up to 4 transducers    
High Speed Analogue Inputs 16bit 30 samples / sec 4-6 channels    
High Resolution Analogue Inputs 24 bit 1 sample / sec 4-6 channels    
Magnetic environment auto calibration    
Magnetic compass variation calibration
Magnetic compass deviation calibration    
NMEA sentences supported GGA, RMC Any Any
AIS sentences and AIS message support Basic All  
Auto pilot output sentences supported XTE, HSC Any Any
Programmable Video Overlay "blackboard"    
Chart Making Tools / Downloads