TORPIDS. .I would be very interested to know why you think there is a mass of paperwork with the HSE [quote] proving <hr></blockquote> that the fonts are not to standard. HSE only took an interest in mid January and had a visit, then asked for proof of compliance with the relevant legislation - TI: The Health and Safety (Display Screen Equipment) Regulations 1992 . .CD: Made 5th November 1992. Laid before Parliament 16th November 1992.. .Coming into force 1st January 1993 . .PB: London : HMSO 1992 . .SE: Statutory Instruments; SI 1992/2792. HEALTH AND SAFETY . .IB: 011025919X . .However the NERC system was designed before 1993 - The suppliers were required to use the following standards or equivalents as. .the basis for the Human Factors design:
a) DEF STAN 00-25 - Human Factors for Designers of Equipment.. .b) MIL STD 1472D - Human Engineering Design Criteria.
The equivalent standard used for the design of the Human Computer Interface. .(HCI) was DIN 66 234 Part 1
HSE also had some supplementary questions, which (as I understand it) NATS are answering as soon as possible. But mainly it has been a matter of satisfying the criteria of the DSE regulations, which the system does as follows:-. .The equivalent standard used for the design of the Human Computer Interface. .(HCI) was DIN 66 234 Part 1, which includes a statement that the text height. .shall appear at a visual angle of at least 18 minutes. The font used for. .all the text in the accepted bay window is Helvetica and an angle of 18. .minutes equates to 10 point text when seen from the design optimum viewing. .distance of around 0.5 metre. The text within the accepted bay varies. .between 10 point and 14 point. The. .smallest text is within the standard, and the text of critical data such as. .entry and exit Flight Level exceeds the required standard.. .For those interested, the smallest NERC font size is Helvetica 10 point (but flight critical data is 14 point) the height is 2.54mm and for 14 point its 4.94mm (to get pixel size take point size and multiply by 0.254).