The Republic of Singapore Navy's second Invincible (Type 218SG)-class submarine, RSS Impeccable , seen here at its commissioning ceremony on 24 September 2024 at Changi Naval Base. (Janes/Ridzwan ...

Used. Removed from a low-hour, freshwater boat. Operated as intended when remove. Unit looks very good for its age. No cracks or yellowing. Radar only; no cable.

Abstract: This paper introduces a novel mapping technique for uniform placement of unit cells on a double-curved frequency selective surface (FSS) and subsequently demonstrates its efficacy by ...