A piece of thick glass inserted in the deck to let light below.
1. Isijungqu esincinci sokhuni olomeleleyo esinomngxunya embindini ukuze kuhlale intambo okanye ukuhlohla intambo kwivili ukuze kudlule kulo ibhanti. 2. Isijungqu seglasi esingqingqwa efakwe kumgangatho ukuze kungene ukukhanya ngaphantsi.