A woman fell and broke her hip on East Runton beach yesterday afternoon, as the tide was coming in.
Coastguards from Sheringham and Cromer went to the aid of the 66-year-old, from Downham Market, and looked after her until an ambulance arrived to take her to hospital.
The teams were back in action later in the day when Humber Coastguard received a 999 call from someone concerned about two swimmers seen about one mile off Cromer Pier at about 8pm.
The lifeboat was set to launch when the all-clear was given. The pair swam powerfully back to shore, according to Sheringham Coastguard Station Officer Jerry Woodley, and explained that they were triathletes in training.
They were advised to alert Humber Coastguard in future to avoid a similar incident.
Fears that a third swimmer was in difficulties were allayed when the extra head spotted popping out of the water near the pair was identified as a seal.
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