Functionality level 1 
Functionality level 2 
Function 
Input information 
Output information 
2.2 Observing the basic 
values 
2.2.1 Record data 
• Air temperature, humidity and 
pressure 
• Water temperature 
• Past values 
• Recording of sensor values for basic values 
with a view to weather observation 
2.2.2 Evaluate data 
• Output information from 2.2.1 
• Determine trend information 
2.2.3 Provide information 
• Output information from 2.2.2 
• Output of basic variables for weather for the 
user 
• Provision for other functionalities 
3. Observing drift 
3.1.1 Record data 
• Speed through water and speed 
over ground 
• Course through water and 
course over ground (made good] 
• Current charts/tide tables, true 
wind 
• Recorded data for determining drift (direction 
and speed) 
3.1.2 Evaluate data 
• Output information from 3.1.1 
• Drift (total of wind and current influence) from 
the difference in movement through the wa 
ter/above ground, according to amount and di 
rection 
• or estimated value from total current and wind 
3.1.3 Provide information 
• Output information from 3.1.2 
• Output of drift for the user 
• Provision for other functionalities