1. While the audience is gathering. During breaks etc
While the audience is gathering. During breaks etc. Simple messages can be added in bold and white letters on the dark blue sea, eg. ”Welcome!”, ”Back at 15.15”

2. Common HTTP Response Codes from VIS
200=Successful
202=Accepted
400=Bad Request
401=Unauthorized
403=Forbidden
404=Not Found
405=Method not allowed
500=Internal Server Error
501=Not implemented

3. References

4. HTTP Code 200 The request has succeeded. [w3.org]
The responded message from VIS is either
object defined in the swagger (all GET methods)
optional relevant ID, such as UVID or local ID

5. HTTP Code 202
The request has been accepted for processing, but the processing has not been completed. [w3.org]
The responded message from VIS is either
object defined in the swagger (all GET methods)
optional relevant ID, such as UVID or local ID
Can be used e.g. by ROS to indicate that the voyage plan has been accepted and route optimization processing will occur

6. HTTP Code 400
The request could not be understood by the server due to malformed syntax [w3.org]
The responded message from VIS is
optional descriptive error message that can include relevant ID

7. HTTP Code 401 The request requires user authentication. [w3.org]
The responded message from VIS is
optional descriptive error message that can include relevant ID

8. HTTP Code 403
The server understood the request, but is refusing to fulfill it. [w3.org]
The responded message from VIS is
optional descriptive error message that can include relevant ID
Sent from VIS when actor is not authorized to information.

9. HTTP Code 404 The server has not found anything matching. [w3.org]
The responded message from VIS is
optional descriptive error message that can include relevant ID
Sent from VIS e.g. when requested voyage plan cannot be found.

10. HTTP Code 405
The method specified in the Request-Line is not allowed for the resource identified by the Request-URI. [w3.org]
The responded message from VIS is
optional descriptive error message that can include relevant ID
Sent from VIS when method (POST, GET, DELETE etc) is not allowed

11. HTTP Code 500
The server encountered an unexpected condition which prevented it from fulfilling the request. [w3.org]
The responded message from VIS is
optional descriptive error message that can include relevant ID

12. HTTP Code 501 The responded message from VIS is
The server does not support the functionality required to fulfill the request. This is the appropriate response when the server does not recognize the request method and is not capable of supporting it for any resource. [w3.org]
The server either does not recognize the request method, or it lacks the ability to fulfil the request. Usually this implies future availability (e.g., a new feature of a web-service API)
The responded message from VIS is
optional descriptive error message
Sent from VIS when method is not implemented

13. Worker service, e.g. Route Optimization Service
Service in focus
External service
SSC
Worker service, e.g. Route Optimization Service
GET /voyagePlans
HTTP Code=403
HTTP Code=403

14. At the end – you could add text in black like ”Thank You !”