In 1987 John Lightfoot was developing an idea in conjunction with Sunderland Shipbuilders, to design a roller blind that could replace solid Perspex anti-glare screens that were hung or placed in front of a vessel's wheelhouse windows to help protect [...]
ໃນ 1987 John Lightfoot ໄດ້ພັດທະນາຄວາມຄິດພ້ອມກັບ Sunderland Shipbuilders ເພື່ອອອກແບບຕາບອດທີ່ສາມາດທົດແທນຫນ້າຈໍປ້ອງກັນແສງສະຫວ່າງຂອງ Perspex ທີ່ຖືກຈັບຫຼືວາງໄວ້ຢູ່ຫນ້າ windowshouse ຂອງເຮືອເພື່ອຊ່ວຍປົກປ້ອງລູກເຮືອຈາກແສງຕາເວັນ.