Suffolk Coroners Court heard two inquests on Friday relating to the deaths of Jason Hammond, 56, and his partner, Ruth Carlisle, 42, both from Lowestoft.
Mr Hammond had been caring for Ms Carlisle who suffered from multiple sclerosis for the past 16 years, the inquest heard.
On January 14 this year, Mr Hammond told Ms Carlisle that he was going to go for a walk at around 7.30pm.
Ms Carlisle reported to the police that she was concerned for his welfare at around 11pm that evening after sending two unanswered texts.
Suffolk Police categorised the call as a high-risk case and the Coastguard and RNLI were called in to help with the search.
He was found lying next to the sea in a private yard in the vicinity of Norfolk Marine in Lowestoft at around 4.14am the following morning.
When Mr Hammond had told his partner he was going for a walk, it had concerned Ms Carlisle, due to Mr Hammond........