A320 GPWS MODE 2 Excess terrain closure rate

[PEI_3721]

Thank you again. Re “the understanding that the terrain/obstacles have been surveyed to this level”. Might that be an assumption too far?

Another aspect might be that human perception of an acceptable flight path over ‘difficult’ terrain during a visual approach might result in a higher glideslope than that allowed by VNAV, thus alerts were not as frequent before VNAV.

Just found a Honeywell briefing which discussed proposed mods – circa 2004/2005. Note the changes below 400ft RA: is this relevant?