Coastguards in the PCS union took industrial action last week over the closure of 50 percent of the rescue stations in Britain.
The closures would mean more than 140 job losses.
The workers ended their shifts an hour early and started an hour late from Monday until Friday.
Workers on the south coast were set to protest on Saturday against ferry companies paying less than the minimum wage to workers recruited abroad.
Condor Ferries and other shipping companies pay some workers as little as £2.35 an hour, thanks to an exemption in the 1976 Race Relations Act. All workers should be entitled to the same pay and conditions.
Portsmouth trades council and the Southampton shipping branch of the RMT union called the protest.
Protest at Portsmouth Continental Ferry Port, George Byng Way, Portsmouth PO2 8SP, at 8am on Saturday 21 July.
Quay assistants in the Unite union at Portsmouth International Port have voted unanimously to strike against the imposition of new conditions.
They are set to be dismissed and rehired on new contracts with extended hours for no extra pay.
Seafarers working for Serco in Scotland are being balloted for strikes.
The ballot is over the firm’s refusal to give assurances over working conditions and job losses.
The ballot is set to close on 9 August. The workers are in the RMT union.