 As a result, SeatGuru has received some criticism for presenting seat maps which are inaccurate and for which no one from the company has travelled on the aircraft; for example, showing bars on aircraft where there are none (on the Singapore A380) or seat rows that don't exist (on the Emirates A380).On many aircraft, the rightmost seats have letter designations HJK, skipping the letter I.This is because each seat has a row number followed by letter; letters that may be confused with numbers (I, O, Q, S, or Z) must be avoided.