Firstly it should be mentioned that in Russian we write and say «инструкторА» instead of «инструкторЫ». The tradition to use the letter «А» instead of «Ы» in the plural number appeared in the squadron a long time ago. Only the commodores know the history of this question well.

Владислав Крапивин, командор-основатель парусной флотилии "Каравелла"