A man who lived just yards away from a sea cadet headquarters decided to target it for burglary.
David Kear broke into the Lytham Sea Cadets buildings on Haven Road, Lytham, three times.
Kear, 34, of Haven Road, stole an outboard motor and specialist tools on his first raid.
They were valued at £1,600, Blackpool Magistrates heard.
The cadets increased security after that raid, installing lighting and CCTV.
But Kear returned again, smashing locks to steal a case of beer causing £200 worth of damage to a door to gain access to the building.
Kear also admitted a third burglary in which nothing was stolen .
Pam Smith prosecuting, said two of the offences took place at night.
She said: “The cadets, which is a charitable organisation, has suffered a great deal of stress because of these raids committed by a man living just a few yards away.”
Kear had eight previous convictions for burglary.
Sue Mugford, defending, said her client had mental health issues and did not recollect the first burglary whatsoever.
She said: “He woke up in the morning and found tools in his home and did not know where they had come from.
“After his last prison sentence he remained out of trouble for 12 months.”
Magistrates ordered pre-sentence reports on Kear.